AHRTA Research Expertise:

AHRTA specializes in aerodynamics, aeroelasticity and hydrodynamics. The AHRTA Partners, together with various research associates, have conducted analytical, computational and experimental investigations on problems concerned with missile aerodynamics, jet flows, wind tunnel aerodynamics, helicopter aerodynamics, flutter, transonic/supersonic aerodynamics, aircraft technology, dynamic stall, viscous flows, vortex flows, flapping airfoil aerodynamics, micro air vehicles, and hydropower generation. A list of publications documenting these investigations pertaining to each area is given below.

Recent Research

Books

  • Max F. Platzer and Nesrin Sarigul-Klijn, “The Green Energy Ship Concept: Renewable Energy from Wind Over Water”, Springer Briefs in Applied Sciences and Technology 2021
  • Max F. Platzer and Nesrin Sarigul-Klijn, “Aerohydronautical Power Engineering”, University Readers, San Diego, CA 2012
  • Tuncer Cebeci, Max Platzer, Hsun Chen, Kuo-Chen Chang, Jian P. Shao, “Analysis of Low-Speed Unsteady Airfoil Flows”, Springer 2005

Power Generation

Convert the ocean wind power into storable energy by means of the “energy ship” concept. Use sailing ships equipped with hydrokinetic turbines and electrolysers to split the sea water into hydrogen and oxygen. This energy ship concept has already attracted considerable attention. For example, Max Platzer was interviewed about it by the BBC World Service in their program “The Forum” on 9 September 2015. You can listen to this interview by clicking on the link below. Skip the first 32 minutes and start listening at 32:15 minutes into the program. The basic principle of the energy ship concept is explained in the figure shown below.

“The Forum” on the BBC World Service at 32 minutes into the program.

  1. Energy Ship Concept
    Energy.Ship.7
  2. Flapping Wing Power Generation
    Video Links to our Flapping Wing Power Generation Program

  • “Oscillating Wing Power Generation,”
    ASME FEDSM99-7050, 3rd ASME/JSME Joint Fluids Engineering Conference, San Francisco, July 18-23, 1999
  • “An Investigation of the Fluid-Structure Interaction in an Oscillating-Wing Micro-Hydropower Generator,”
    published in Fluid Structure Interaction II, WIT Press, 2003, pp. 73-84
  • “A Novel Approach to Extract Power from Free-Flowing Water and High-Altitude Jet Streams,”
    Paper No. ES 2009-90146, ASME Energy Sustainablity Conference, San Francisco, California, June 2009
  • “A New Oscillating-Foil Power Generator for Sailingship-Based Renewable Energy Generation,” Paper No. ES 2010-90048, ASME Energy Sustainability Conference, Phoenix, Arizona, May 2010
  • “Renewable Hydrogen Production using Sailing Ships,”
    ASME International Mechanical Engineering Congress & Exposition, Denver, Colorado, IMECE2011-62311 November 2011
  • “Flapping-Wing Technology: The Potential for Air Vehicle Propulsion and Airborne Power Generation,”
    26th Congress of the Aeronautical Sciences (ICAS), Anchorage, Alaska, September 2008
  • “Extracting Power in Jet Streams: Pushing the Performance of Flapping-Wing Technology,”
    27th Congress of the Aeronautical Sciences (ICAS), Nice, France, September 2010
  • “Numerical Analysis of an Oscillating-Wing Wind and Hydropower Generator,”
    AIAA Journal, Vol. 49, No. 7, July 2011
  • “Analysis of the Conversion of Ocean Wind Power into Hydrogen,”
    Proc. World Renewable Energy Congress, Perth, Australia, 14-18 July 2013
  • “Experimental and Computational Investigation of the Drag of a Towed Hydropower Turbine,”
    ASME 2013 International Mechanical Engineering Congress and Exposition, IMECE 2013-63700, 2013
  • “Renewable Power via Energy Ship and Graz Cycle,”
    Proc. 15th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC, Honolulu, HI, 24-28 February 2014
  • “Renewable Hydrogen Production Using Sailing Ships,”
    ASME Journal of Energy Resources Technology, Vo. 136, p. 021203, June 2014
  • “Numerical Simulation of Fully Passive Flapping Foil Power Generation,”
    AIAA Journal, Vol. 51, No.11, pp. 2727-2739, November 2013
  • “Experimental and Computational Investigation of the Flow through an Oscillating-Wing Power Generator,”
    52nd Aerospace Sciences Meeting, AIAA 2014-1283, January 2014
  • “Flow around an Oscillating Tandem-Wing Power Generator,”
    53rd AIAA Aerospace Sciences Meeting, AIAA 2015-1751, January 2015
  • “Is there an Engineering approach for the Transition to a Sustainable Hydrogen Economy?,”
    Conference on Sustainable Development and Planning VII, Wessex Institute of Technology Transactions on Ecology and the Environment, May 2015
  • “Optimal Energy System Design Applied to an Innovative Ocean Wind Energy Converter,”
    Conference on Sustainable Development and Planning VII, Wessex Institute of Technology Transactions on Ecology and the Environment, May 2015
  • “Carbon-Neutral Jet Fuel Production from Seawater,”
    to be published in International Journal of Sustainable Aviation
  • “Flow Structures around an Oscillating-Wing Power Generator,”
    AIAA Journal, Vol. 53, No. 11, pp. 3316-3326, November 2015
  • “Energy Ships and Plug-In Hybrid Electric Vehicles: Are they the Key for a Rapid Transition to an Emission-Free Economy?,”
    ASME International Mechanical Engineering Congress and Exposition, IMECE 2015-50652, November 2015
  • “Analytical Method towards an Optimal Energetic and Economical Wind-Energy Converter,”
    Journal of Energy, Vol. 94, pp. 344-351, 2016
  • “Review of Progress and Challenges in Flapping Foil Power Generation,”
    Progress in Aerospace Sciences, Vol. 67, pp. 2-28, 2014

Micro Air Vehicles

  • “Bio-Inspired Design of Flapping-Wing Micro Air Vehicles,”
    The Aeronautical Journal, Vol. 109, No. 1098, August 2005, pp. 385-393
  • “Flapping-Wing Propulsion for a Micro Air Vehicle,”
    AIAA 2001-0126, 39th AIAA Aerospace Sciences Meeting, Reno, Nevada, January 8-11
  • “On the Use of Vortex Flows for the Propulsion of Micro Air and Sea Vehicles,”
    NATO RTO-AVT Symposium, Loen, Norway, May 7-11, 2001, published in RTO-MP-069
  • “On the Design of Efficient Micro Air Vehicles,”
    published in Design and Nature, WIT Press, 2002, pp. 67-76
  • “Aerospace Engineering Education at the Naval Postgraduate School,”
    AIAA 2003-0237, 41st AIAA Aerospace Sciences Meeting, Reno, Nevada, January 6-9, 2003
  • “Experimental Investigation of the Aerodynamic Characteristics of Flapping-Wing Micro Air Vehicles,”
    AIAA 2003-0418, 41st AIAA Aerospace Sciences Meeting, Reno, Nevada, January 6-9, 2003
  • “Development and Flight Testing of Flapping-Wing Propelled Micro Air Vehicles,”
    AIAA 2003-6549, 2nd AIAA Unmanned Unlimited Systems, Technologies, and Operations, San Diego, California, September 15-18, 2003
  • “On Flow Separation Control by Means of Flapping Wings,”
    2nd International Symposium on Aqua Bio-Mechanisms, Honolulu, Hawaii, September 14-17,2003
  • “Improved Performance and Control of Flapping-Wing Propelled Micro Air Vehicles,”
    AIAA Paper No. 2004-0399, 42nd Aerospace Sciences Meeting, Reno, Nevada, January 5-8, 2004
  • “Improved Performance and Control of Flapping-Wing Propelled Micro Air Vehicles,”
    Invited talk at the Royal Aeronautical Society Annual Meeting, September 14-15, 2004, Paper 12.

Flapping Aerofoil Aerodynamics

  • “Flapping-Wing Aerodynamics: Progress and Challenges,”
    AIAA Journal, Vol. 46, No. 9, September 2008, pp. 2136-2149
  • “Aerodynamic Analysis of Flapping Wing Propulsion,”
    AIAA Paper 93-0484, 31st Aerospace Sciences Meeting, Reno, Nevada, January 11-14, 1993
  • “Computational Analysis of Flapping Airfoil Aerodynamics,”
     ASME Paper presented at the ASME Fluids Engineering Conference, Lake Tahoe, CA, 20-23 June 1994, Advances in Computational Methods in Fluid Dynamics, FED Vol. 196, pp. 9-18
  • “Wake Structures behind Plunging Airfoils: A Comparison of Numerical and Experimental Results,”
    AIAA Paper 96-0078, 34th Aerospace Sciences Meeting, Reno, Nevada, 15-18 January 1996
  • “Thrust Generation due to Airfoil Flapping,”
    AIAA Journal, Vol. 34, No. 2, February 1996, pp. 324-331
  • “Computational and Experimental Investigation of the Wakes Shed from Flapping Airfoils and their Wake Interference/Impingement Characteristics,”
    78th AGARD Fluid Dynamics Symposium,Trondheim, Norway, 20-23 May 1996
  • “Unsteady Aerodynamics of Stationary/Flapping Airfoil Combination in Tandem,”
    AIAA 97-0659, 35th Aerospace Sciences Meeting, Reno, Nevada, January 6-10, 1997
  • “Numerical Computation of Flapping-Wing Propulsion and Power Extraction,”
    AIAA 97-0826, 35th Aerospace Sciences Meeting, Reno, Nevada, January 6-10, 1997
  • “Control of Backward Facing Step Flow Using a Flapping Airfoil,”
    FEDSM97-3307, ASME Fluids Engineering Division Summer Meeting, Vancouver, Canada, June 22-26, 1997
  • “The Jet Characteristics of a Plunging Airfoil,”
    AIAA 98-0101, 36th Aerospace Sciences Meeting, Reno, Nevada, January 12-15, 1998
  • “Experimental and Numerical Investigation of Flapping-Wing Propulsion and its Application for Boundary Layer Control,”
    ASME Paper 98-GT-46, International Gas Turbine Congress, June 2-5, 1998
  • “A Computational Study of Flow Reattachment over a Stationary and Flapping Airfoil Combination in Tandem,”
    AIAA 98-0109, 36th Aerospace Sciences Meeting, Reno, Nevada, January 12-15, 1998
  • “Experimental and Computational Investigation of the Knoller-Betz Effect,”
    AIAA Journal, Vol. 36, No. 7, July 1998, pp. 1240-1246
  • “The Characteristics of a Plunging Airfoil at Zero Free-Stream Velocity,”
     FEDSM98-4946, ASME Fluids Engineering Division Summer Meeting, Washington, D.C., June 21-25, 1998
  • “Flow Separation Control by Means of Flapping Foils,”
    Proc. Int. Symp. On Seawater Drag Reduction, 22-23 July 1998, Newport, Rhode Island, pp. 471-478
  • “A Computational Study on the Dynamic Stall of a Flapping Airfoil,”
    AIAA 98-2519, 16th AIAA Applied Aerodynamics Conference, Albuquerque, New Mexico, June 15-18, 1998
  • “A Computational Study of Flow Separation Characteristics and Wake Profiles behind a Flapping Airfoil,”
    AIAA 99-0648, 37th AIAA Aerospace Sciences Meeting, Reno, Nevada, January 11-14, 1999
  • “An Experimental and Numerical Investigation of Flapping-Wing Propulsion,”
    AIAA 99-0995, 37th AIAA Aerospace Sciences Meeting, Reno, Nevada, January 11-14, 1999
  • “Jet Characteristics of a Plunging Airfoil,”
    AIAA Journal, Vol. 37, No. 12, pp. 1529-1537, December 1999
  • “Flapping-Wing Propulsion for a Micro Air Vehicle,”
    AIAA 2000-0897, 38th Aerospace Sciences Meeting, Reno, Nevada, January 10-13, 2000
  • “Computational Study of Flapping Airfoil Aerodynamics,”
    Journal of Aircraft, Vol. 37, No. 2, May-June 2000, pp. 514-52
  • “Computational and Experimental Investigation of Flapping-Foil Propulsion,” First International Symposium on Aqua Bio-Mechanisms, Honolulu, Hawaii, August 27-30, 2000
  • “Unsteady Aerodynamics of Flapping-Foil Propellers,”
    Proc. 9th Int. Symp. on Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity in Turbomachines, Lyon, France, September 4-8, 2000, pp. 123-147
  • “Experimental and Computational Investigation of Flapping Wing Propulsion for Micro Air Vehicles,”
    chapter 16 in Volume 195 of Progress in Astronautics and Aeronautics, 2001, pp. 307-336
  • “Characteristics of a Plunging Airfoil at Zero Freestream Velocity,”
     AIAA Journal, Vol. 39, No. 3, March 2001, pp. 531-534
  • “A Numerical and Experimental Investigation of Flapping-Wing Propulsion in Ground Effect,”
    AIAA 2002-0866, 40th AIAA Aerospace Sciences Meeting, Reno, Nevada, January 14-17, 2002
  • “A Collaborative Numerical and Experimental Investigation of Flapping-Wing Propulsion,”
    AIAA 2002-0706, 40th AIAA Aerospace Sciences Meeting, Reno, Nevada, January 14-17, 2002
  • “Control of Backward-Facing Step Flow Using a Flapping Foil,”
    Experiments in Fluids, Vol. 32, pp. 44-54, 2002

Missile Aerodynamics

  • “On the Linearized Compressible Flow over Pulsating and Oscillating Bodies,”
    7th International Aeronautical Congress, Paris, France, June 1965.
  • “On the Calculation of Dynamic Stability Derivatives for Pointed Bodies of Revolution in Supersonic Flow,”
    Proc. 2nd Workshop on Dynamic Stability Testing, AEDC Tullahoma, Tenn., April 1966.
  • “On Supersonic Flow past Oscillating Bodies of Revolution,”
    AIAA Journal 4, 370, February 1966.
  • “Quasi-Slender Body Theory for Slowly Oscillating Bodies,”
    AIAA Journal 4, 1963, September 1966.
  • “Pulsating Bodies of Low Aspect Ratio in Subsonic and Supersonic Flow,”
    Acta Mechanica, Vol. II/1, 1966, pp. 70-89.
  • “Dynamic Stability Analysis of Bodies of Revolution in Supersonic Flow,”
    Journal of Spacecraft, Vol. 5, No. 7, July 1968, pp. 833-837.
  • “Higher Approximations for Supersonic Flow past Slowly Oscillating Bodies of Revolution,”
    Acta Mechanica, Vol. V, 1968, pp. 143-162.
  • “First and Second-Order Theories for Supersonic and Transonic Flow Past Oscillating Bodies of Revolution,”
    Proc. 3rd Workshop on Dynamic Stability Testing, NASA Ames Research Center, Nov. 4-7, 1968.
  • “On the Calculation of Static and Dynamic Stability Derivatives for Bodies of Revolution at Subsonic and Transonic Speeds,”
    AIAA Paper 70-190, 8th Aerospace Sciences Meeting, New York, January 19-21, 1970.
  • “Stability Derivatives for Bodies of Revolution at Subsonic Speeds,”
    AIAA Journal, Vol. 14, February 1976, pp. 247-250.
  • “Unsteady Linearized Transonic Flow Analysis for Slender Bodies,”
    AIAA Journal, Vol. 15, July 1977, pp. 966-973.
  • “Aerodynamic Characteristics of a Canard-Controlled Missile at High Angles of Attack,”
    AIAA paper 93-0763, 31st Aerospace Sciences Meeting, Reno, Nevada, January 11-14, 1993.
  • “Aerodynamic Characteristics of the MMPT ATD Vehicle at HighAngles of Attack,”
    AIAA Paper 93-3493, 11th Applied Aerodynamics Conference, Monterey, CA, 9-11 August 1993.
  • “Aerodynamic Characteristics of a Canard-Controlled Missile at High Angles of Attack,”
    Journal of Spacecraft and Rockets, Vol. 31, No. 5, September-October 1994, pp. 766-772.
  • “High-Angle-of-Attack Wind-Tunnel Investigation of a Multi-Mission Vehicle,”
    Journal of Spacecraft and Rockets, Vol. 32, No. 4,, July-August 1995, pp. 734-736.
  • “Numerical Investigation of Subsonic Flow over a Typical Missile Forebody,”
    AIAA Paper 96-0189, 34th Aerospace Sciences Meeting, Reno, Nevada, 15-18 January 1996.
  • “Evaluation of the NASA-Ames Panel Method (PMARC) for Aerodynamic Missile Design,”
    AIAA Paper 96-0775, 34th Aerospace Sciences Meeting, Reno, Nevada, 15-18 January 1996.
  • “PMARC Potential Flow Solutions with Wakes over an Ogive Cylinder at High Incidence,”
    AIAA 97-1968, 28th AIAA Fluid Dynamics Conference, June 29-July 2, 1997.
  • “A Computational Study of Subsonic Flowfields over a Missile Configuration,”
    AIAA 97-0635, 35th Aerospace Sciences Meeting, Reno, Nevada, January 6-10, 1997.
  • “Potential Flow Solutions with Wakes over an Ogive Cylinder,”
    Journal of Spacecraft and Rockets, Vol. 35, No. 3, May-June 1998, pp. 273-277.
  • “Computational Investigations of Subsonic High Angle of Attack Missile Flows,”
    Paper No. 28,RTO-MP-5, RTO-AVT Symposium on Missile Aerodynamics, Sorrento, Italy, 11-14 May 1998.
  • “Navier-Stokes Analysis of Subsonic Flowfields over a Missile Configuration,”
    Journal of Spacecraft and Rockets, Vol. 35, No. 2, March-April 1998, pp. 127-131.
  • “Computational Investigation of Flow through a Louvered Inlet Configuration,”
    Journal of Aircraft, Vol. 39, No. 5, 2002, pp. 903-906.

Jet Flows

  • “Experimental Investigation of Incompressible Flow past Airfoils with Oscillating Jet Flaps,”
    Journal of Aircraft 8/8, August 1971, pp. 587-592.
  • “Airfoil Including Fluidically Controlled Jet Flap,”
    U.S. Patent No. 3,669,386, June 13, 1972 assigned to Lockheed Aircraft Corp.
  • “Experimental Investigation of Oscillatory Jet Flow Effects,”
    Proc. Symposium on Unsteady Aerodynamics, University of Arizona, Vol. I, July 1975, pp. 383-414.
  • “Velocity Measurements in an Oscillating Plane Jet Issuing into a Moving Airstream,”
    Journal of Fluid Mechanics, Vol. 84, 1978, pp.33-35.
  • “Entrainment Characteristics of Unsteady Subsonic Jets,”
    AIAA Journal, Vol. 16, No. 3, March 1978, pp. 282-284.
  • “A Quasi-Steady Theory for Incompressible Flow past Airfoils with Oscillating Jet Flaps,”
     AIAA Journal, Vol. 16, No. 3, March 1978, pp.237-241.
  • “Experimental Investigation of Oscillating Subsonic Jets,”
    Proc. Symposium on Numerical and Physical Aspects of Aerodynamic Flows, Springer New York Heidelberg Berlin, 1981, pp. 575-587.
  • “Jet Excitation by an Oscillating Vane,”
    AIAA Journal, Vol.19, 198, pp. 673-677.
  • “Jet Excitation by an Oscillating Vane,”
    U.S. Patent No. 4,413,782.
  • “Experimental Investigation of Oscillating Subsonic Jets,”
    Proc. Ejector Workshop for Aerospace Applications, Dayton, Ohio, June 1982, AFAWL-TR-82-3059, pp. 463-474.
  • “A Description of the Velocity Field of a Vane Excited Jet,”
    8th Australasian Fluid Mechanics Conference, Newcastle, Australia, 28 November – 2 December 1983.
  • “Mixing Effectiveness of Vane-Excited Jets,”
    Proc. Symposium on Fluid Dynamics, University of Illinois, April 26-27, 1984, pp.81-92.
  • “Measurements of Vane-Excited Jets,”
    Proc. 2nd International Symposium on Applications of Laser Anemometry to Fluid Mechanics, July 2-4, 1984, Lisbon, Portugal.
  • “The Mixing Mechanism by Organized Turbulence Structures in a Plane Jet Excited by a Novel Method,”
    Proc. IUTAM Symposium on Turbulence Management and Relaminarization, Springer Verlag, 1988, pp.741-784.
  • “Excitation of Plane Jet by Twin-Vane Oscillator,”
    AIAA Paper 89-0663, 27th Aerospace Sciences Meeting, Reno, Nevada, January 1989.

Wind Tunnel Aerodynamics

  • “Theoretical Investigation of Wind Tunnel Interference Effects upon Fluttering Panels and Airfoils in Low Supersonic Flow,”
    Proc. AIAA/ASME/SAE Structures, Structural Dynamics and Materials Conference, Denver, CO, April 22-24, 1970, pp. 17-24.
  • “Wind Tunnel Interference on Oscillating Airfoils in Low Supersonic Flow,”
    Acta Mechanica 16, 1973, pp. 115-126.
  • “Analysis of the Effect of Porous Wall Interference on Transonic Airfoil Flutter,”
    AIAA 2001-2725, 31st AIAA Fluid Dynamics Conference, June 11-14, 2001, Anaheim, California.
  • “Navier-Stokes Analysis of Wind Tunnel Interference on Transonic Airfoil Flutter,”
    AIAA Journal, Vol. 40, No. 7, July 2002, pp. 1269-1276.
  • “Numerical Investigation of Transonic Flutter and Modeling of Wind Tunnel Interference Effects,”
    Symposium Transsonicum IV, Goettingen, Germany, September 2002, Kluwer Academic Publishers, pp. 71-78.

Helicopter Aerodynamics

  • “The Unsteady Aerodynamics of Higher Harmonic Control,”
    19th European Rotorcraft Forum, Cernobbio, Italy, September 14-16, 1993.
  • “On the Computation of Helicopter Wake-Induced Unsteady Aerodynamics Due to Higher Harmonic Control,”
    Fifth Workshop on Dynamics and Aeroelastic Stability Modeling of Rotorcraft Systems, Rensselaer Polytechnic Institute, 18-20 October 1993.

Flutter

  • “Theoretical Investigation of Supersonic Cascade Flutter,”
    AIAA Paper 72-277, Proc. AIAA/ASME/SAE 13th Structures, Structural Dynamics and Materials Conference, San Antonio, Texas, April 10-12, 1972.
  • “Unsteady Transonic and Supersonic Cascade Flows,”
    Proc. Project SQUID Workshop on Aeroelasticity in Turbomachines, Indianapolis, June 1-2, 1972, pp. 196-211.
  • “A Linearized Characteristics Method for Supersonic Flow past Vibrating Shells,”
    AIAA Journal, Vol. 11, Sept. 1973, pp. 1302-1305.
  • “Theoretical Investigation of Supersonic Flow past Oscillating Cascades with Subsonic Leading-Edge Locus,”
    AIAA Paper 74-14, 12th Aerospace Sciences Meeting, Washington, D.C., January 30-February 1, 1974.
  • “Transonic Blade Flutter – A Survey,”
     Invited Review Paper, The Shock and Vibration Digest, Vol. 7, July 1975, pp. 97-106.
  • “On the Analysis of Supersonic Flow past Oscillating Cascades,”
    AGARD Conference Proceedings on Unsteady Phenomena in Turbomachinery, Monterey, CA, September 1975, AGARD-CP-177, Paper No. 29.
  • “Unsteady Phenomena in Turbomachinery,”
    Technical Evaluation Report on 46th Propulsion & Energetics Panel Meeting, AGARD Conference Proceedings No. 177, April 1976, pp. 9-16.
  • “On the Analysis of the Aerodynamic and Flutter Characteristics of Transonic Compressor Blades,”
    Revue Francaise de Mecanique, Numero Special, 1976, pp. 65-72.
  • “Unsteady Flows in Turbomachines – A Review of Current Developments,”
    AGARD Symposium on Unsteady Aerodynamics, Ottawa, Canada, September 26-28, 1977, AGARD-CP-277, pp. 33-1 to 33-28.
  • “Aeroelastic Stability Analysis of Supersonic Cascades,”
     ASME Paper 78-GT-151, International Gas Turbine Congress, London, April 9-13, 1978.
  • “Transonic Blade Flutter – A Survey of New Developments,”
    The Shock and Vibration Digest, Vol. 10, No. 9, September 1978, pp. 11-20.
  • “Aeroelastic Stability Analysis of Supersonic Cascades,”
    ASME Journal of Engineering for Power, Vol. 101 October 1979, pp. 533-541.
  • “Transonic Blade Flutter – A Survey of New Developments,”
    The Shock and Vibration Digest, Vol. 14, No. 7, July 1982, pp. 3-8.
  • “Numerical Investigation of Unsteady Compressible Flow through Nozzles and Cascades,”
    Proc. 4th International Symposium on Unsteady Aerodynamics and Aeroelasticity of Turbomachines and Propellers, Aachen, Germany, September 6-10, 1987.
  • “Computational Investigation of Airfoil Stall Flutter,”
    Proc. 6th International Symposium on Unsteady Aerodynamics of Turbomachines, University of Notre Dame, Indiana, September 16-19, 1991, Springer Verlag.
  • “Numerical Investigation of Stall Flutter,”
    ASME Paper 94-GT-206, International Gas Turbine and Aeroengine Congress, The Hague, Netherlands, 13-16 June 1994.
  • “Progress in the Analysis of Blade Stall Flutter,”
    Proc. 7th Int. Symp. on Unsteady Aerodynamics and Aeroelasticity of Turbomachines, Fukuoka, Japan, 25-29 September 1994, pp. 287-302.
  • “A Panel Code for the Analysis of Blade Flutter and Blade Interference Effects in Incompressible Flow,”
    Proc. 7th Int. Symp. on Unsteady Aerodynamics and Aeroelasticity of Turbomachines, Fukuoka, Japan, 25-29 September 1994, Elsevier 1995, pp. 55-71.
  • “Time-Domain Flutter Analysis of a Two-Airfoil System with Application to Unsteady Rotary Wing Flow Fields,”
    AIAA Paper 95-0337, 33rd Aerospace Sciences Meeting, Reno, Nevada, 9-12 January 1995.
  • “Computational Investigation of Resonance Effects in Turbomachinery Bladings,”
    ASME paper presented at ASME Winter Annual Meeting, San Francisco, CA, 12-17 November 1995, published in Computational Fluid Dynamics in Aeropropulsion, AD-Vol.49, pp. 23-29.
  • “Recent Progress in the Prediction of Blade Vibration and Flutter,”
     paper presented at the 5th Latin-American Turbo-machinery Congress, Acapulco, Mexico, 7-10 November 1995.
  • “Numerical Investigation of Stall Flutter,”
    ASME Journal of Turbomachinery, Vol. 118, April 1996, pp. 197-203.
  • “Time-Domain Analysis of Low-Speed Airfoil Flutter,”
     AIAA Journal, Vol. 34, No. 5, May 1996, pp. 1027-1033.
  • “Airfoil Geometry and Flow Compressibility Effects on Wing and Blade Flutter,”
    AIAA 98-0517, 36th Aerospace Sciences Meeting, Reno, Nevada, January 12-15, 1998.
  • “Transonic Flutter Computations for a 2D Supercritical Wing,”
    AIAA 99-0798, 37th AIAA Aerospace Sciences Meeting, Reno, Nevada, January 11-14, 1999.
  • “Transonic Flutter Computations for the NLR 7301 Airfoil inside a Wind Tunnel,”
     AIAA 2000-0984, 38th Aerospace Sciences Meeting, Reno, Nevada, January 10-13, 2000.
  • “A Navier-Stokes Analysis of the Stall Flutter Characteristics of the Buffum Cascade,”
    ASME Paper 2000-GT-385, International Gas Turbine Congress, Munich, Germany, May 8-11, 2000.
  • “A Navier-Stokes Analysis of the Stall Flutter Characteristics of the Buffum Cascade,”
    Journal of Turbomachinery, Vol. 122, October 2000, pp. 769-776.
  • “Numerical Analysis of the Stall Flutter Characteristics of the Buffum Cascade,”
    Proc. 9th International Symposium on Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines, Lyon, France, September 4-8, 2000, pp. 762-779.
  • “Transonic Flutter Computations for the NLR 7301 Supercritical Airfoil,”
    Aerospace Science & Technology, Vol. 5, 2001, pp. 293-304.

Transonic/Supersonic Aerodynamics

  • “Non-Steady Phenomena in Transonic and Supersonic Flows and Possible Methods of Solution,”
    Proc. Workshop on Flow in Turbomachines, Monterey, CA, December 1970.
  • “Approximate Methods for Transonic Flow past Finite Wedge Profiles,”
     Zeitschrift fuer angewandte Mathematik und Mechanik, (ZAMM) Vol. 56, 1976, pp. 51-57.
  • “Numerical Simulation of Inviscid Transonic Flow through Nozzles with Fluctuating Back Pressure,”
    ASME Journal of Turbomachinery, Vol. 111, April 1989, pp. 169-180.
  • “Oscillating Supersonic/Hypersonic Wings at High Incidence,”
    AIAA Journal, Vol. 20, No.3, March 1982, pp. 299-304.
  • “On the Effect of Area Ruling on Transonic Abrupt Wing Stall,”
    Symposium Transsonicum IV, Goettingen, Germany, September 2002, Kluwer Academic Publishers, pp. 99-104.

Aircraft Technology

  • “Prediction Methods for Jet V/STOL Propulsion Aerodynamics,”
    AIAA Paper 76-932, AIAA Aircraft Systems & Technology Meeting, Dallas, Texas, September 27-29, 1976.
  • “Prediction Methods for Jet V/STOL Propulsion Aerodynamics,”
    Journal of Aircraft, Vol. 15, No. 2 February 1978, pp. 64-77.
  • “Sea-Based Multimission STOVL Application of an AIBF/VT Hybrid Powered Lift System,”
    AIAA/AHS/ASEE Aircraft Systems, Design and Technology Meeting, Dayton, Ohio, October 20-22, 1986.
  • “Sea-Based Multimission STOVL Application of an AIBF/VT Hybrid Powered Lift System,”
    Journal of Aircraft, Vol. 24, No. 7, July 1987, pp. 417-423.
  • “The Future of Naval Aviation – A Third Approach,”
    Naval War College Review, November 1982, pp. 22-26.
  • “Ground-Effect Studies on STOVL Aircraft in Hover,”
    Proc. 6th Asian Congress of Fluid Mechanics, Singapore, 22-26 May 1995, pp. 194-197.
  • “Subscale Studies of Strut and Wall Influence on the Ground-Plane Flow of Hovering VSTOL Aircraft,”
    7th Asian Congress of Fluid Mechanics, Madras, India, December 8-12, 1997.
  • “A Subscale LDV Study of the Flowfield near the Wingtip of a Hovering VSTOL Aircraft,”
    AIAA 99-0905, 37th AIAA Aerospace Sciences Meeting, Reno, Nevada, January 11-14, 1999.
  • “Strut and Wall Influence on the Ground-Plane Flow of a Hovering STOVL Aircraft,”
    AIAA 99-3221, 17th AIAA Applied Aerodynamics Conference, Norfolk, Virginia, June 28-July 1, 1999.
  • “Integrated Propulsion/Lift/Control Systems for Aircraft and Ship Applications,”
    U.S. Patent No. 5975462, November 1999
  • “Experimental and Computational Investigation of Cross-Flow Fan Propulsion for Lightweight VTOL Aircraft,”
    ASME Paper No. GT2004-53468, ASME TURBO EXPO 2004, Vienna, Austria, June 2004.

Dynamic Stall

  • “Experimental and Computational Studies of Dynamic Stall,”
    Proc. 4th Symposium on Numerical and Physical Aspects of Aerodynamic Flows, Springer Verlag, 1990, pp. 239-255.
  • “Numerical Investigation of the Effect of Leading-Edge Geometry on Dynamic Stall of Airfoils,”
    AIAA Paper 91-1798, AIAA 22nd Fluid Dynamics, Plasma Dynamics & Lasers Conference, Honolulu, Hawaii, June 24-26, 1991.
  • “Dynamic Airfoil Stall Investigations,”
    5th Symposium on Numerical and Physical Aspects of Aerodynamic Flows, Long Beach, CA, January 13-15, 1992.
  • “An Inviscid-Viscous Interaction Approach to the Calculation of Dynamic Stall Initiation on Airfoils,”
    ASME Paper 92-GT-128,International Gas Turbine Congress, Cologne, Germany, June 1-4,1992.
  • “Interferometric and Computational Studies of an Oscillating Airfoil Compressible Dynamic Stall Flow Field,”
    Proceedings of the Fifth Asian Congress of Fluid Mechanics, Taejon, Korea,Vol. 2, August 10-14, 1992, pp. 1047-1050.
  • “A Viscous-Inviscid Interaction Approach to the Calculation of Dynamic Stall Initiation on Airfoils,”
    ASME Journal of Turbomachinery, Vol. 115, No. 4, October 1993, pp. 714-723.
  • “Computational Investigation of Airfoil Stall Flutter,”
    Proc. 6th Int. Symposium on Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines and Propellers, Springer Verlag 1993, pp. 415-432.
  • “Effects of Turbulence Modeling and Transition on the Numerical Prediction of Dynamic Stall,”
    3rd International Symposium on Engineering Turbulence Modelling and Measurements, Heraklion, Crete, 27-29 May 1996.
  • “Analysis of Compressible Light Dynamic Stall Flow at Transitional Reynolds Numbers,”
    AIAA Journal, Vol. 34, No. 7, July 1996, pp. 1420-1427.
  • “Computational Prediction of Airfoil Dynamic Stall,”
    Progress in Aerospace Sciences, Vol. 33, 1997, pp. 759-846.
  • “A Fast Method for the Prediction of Dynamic Stall Onset on Turbomachinery Blades,”
    ASME Paper 97-GT-101, International Gas Turbine Congress, Orlando, Florida, June 2-5, 1997.
  • “On the Prediction of Dynamic Stall Onset on Airfoils in Low Speed Flow,”
    Proc. 8th Int. Symp. On Unsteady Aerodynamics and Aeroelasticity of Turbomachines, Stockholm, Sweden, 14-18 September 1997, pp. 797-811.
  • “The Effect of Transition Modeling on the Prediction of Compressible Deep Dynamic Stall,”
    7th Asian Congress of Fluid Mechanics, Madras, India, December 8-12, 1997.
  • “Steady and Dynamic Stall Analysis of the NLR 7301 Airfoil,”
    ASME Paper 99-GT-21, International Gas Turbine Congress, Indianapolis, Indiana, June 7-10, 1999.
  • “Computational Simulation of Dynamic Stall on the NLR 7301 Airfoil,”
    Journal of Fluids and Structures, Vol. 14, pp. 779-798, 2000.

Viscous Flows

  • “A General Method for Unsteady Stagnation Region Heat Transfer and Results for Model Turbine Flows,”
    Joint ASME/JSME 2nd Thermal Engineering Conference, Honolulu, Hawaii, March 22-27,1987.
  • “Unsteady Flow and Heat Transfer around Stator Blades,”
    Workshop on Computational Fluid Dynamics, George C. Marshall Space Flight Center, Huntsville, Alabama, April 21-23, 1987.
  • “Progress in the Prediction of Unsteady Heat Transfer on Turbine Blades,”
    Proc. Conference on Structural Integrity and Durability of Reusable Space Propulsion Systems, NASA Lewis Research Center, Cleveland, Ohio, May 12-13, 1987, pp. 21-27.
  • “Progress toward the Development of an Inviscid-Viscous Interaction Method for Unsteady Flows in Turbomachinery Cascades,”
     Proc. 4th International Symposium on Unsteady Aerodynamics and Aeroelasticity of Turbomachines and Propellers, Aachen, Germany, September 6-10, 1987.
  • “Transition Modelling Effects on Viscous/Inviscid Interaction Analysis of Low Reynolds Number Airfoil Flows Involving Laminar Separation Bubbles,”
     Paper 88-GT-32, ASME International Gas Turbine and Aero-Engine Congress, Amsterdam, Netherlands, June 1988.
  • “Unsteady Heat Transfer on Turbine Blades,”
     AIAA Journal of Thermophysics and Heat Transfer, January 1990.
  • “Computation of Unsteady Flows over Airfoils,”
    NASA/AFOSR/ARO Workshop on Physics of Forced Unsteady Separation, NASA Ames Research Center, Moffett Field, CA, NASA CP-3144, April 17-19, 1990, pp. 177-185.
  • “Investigation of Unsteady Flows over Airfoils,”
     Int. Conf. on Computational Physics, Boulder, CO, June 11-15, 1990.
  • “Essential Ingredients for the Computation of Steady and Unsteady Blade Boundary Layers,”
    Paper 90-GT-160, ASME International Gas Turbine and Aero-Engine Congress, Brussels, Belgium, June 1990.
  • “Essential Ingredients for the Computation of Steady and Unsteady Blade Boundary Layers,”
    Journal of Turbomachinery, Vol.13, October 1991, pp. 608-616.
  • “Flow Visualization and Wake Analysis for Complex Three-Dimensional Bluff Bodies at Subcritical through Critical Reynolds Numbers,”
    AIAA Paper 92-0155, 30th Aerospace Sciences Meeting, Reno, NV, January 6-9, 1992.
  • “Unsteady Airfoil Flow Solutions on Moving Zonal Grids,”
    AIAA paper 92-0543, 30th Aerospace Sciences Meeting, Reno, NV, January 6-9, 1992.
  • “Computational Investigation of Unsteady Heat Transfer on Oscillating Airfoils,”
    Proc. 11th National Heat Transfer Congress, Milano, Italy, June 24-26, 1993, pp. 353.
  • “A Zonal Viscous-Inviscid Interaction Method for 2-D Unsteady, Compressible Viscous Flows,”
    ASME Fluids Engineering Conference, Washington, D.C., 20-24 June 1993.
  • “A Viscous-Inviscid Interaction Method for 2-D Unsteady Compressible Flows,”
    24th AIAA Fluid Dynamics Conference, Orlando, Florida, July 6-9,1993.
  • “Computational and Experimental Investigations of Airfoil Leading-Edge Separation Bubbles,”
    Endstage Transition Workshop, Syracuse University, 16-17 August 1993.
  • “Zonal Method for Unsteady, Viscous, Compressible Airfoil Flows,”
    Journal of Fluids and Structures, Vol. 8, January 1994, pp. 107-123.
  • “A Novel Viscous-Inviscid Interaction Method with Inviscid Wake Modelling,”
     AIAA Paper 94-0178, 32nd Aerospace Sciences Meeting, January 10-13, January 1994.
  • “Analysis of Low Reynolds Number Airfoil Flows,”
    AIAA Paper 94-0534, 32nd Aerospace Sciences Meeting, January 10-13, 1994.
  • “Analysis of Compressible Steady and Oscillatory Airfoil Flows at Transitional Reynolds Numbers,”
    AIAA Paper 94-2255, 25th AIAA Fluid Dynamics Conference, Colorado Springs, 20-23 June 1994.
  • “Analysis of Airfoils at Low Reynolds Numbers,”
    Proc. 7th Int. Symp. on Unsteady Aerodynamics and Aeroelasticity of Turbomachines, Fukuoka, Japan, 25-29 September 1994, pp. 303-320, Elsevier 1995.
  • “A Novel Viscous-Inviscid Interaction Method for Unsteady Low-Speed Airfoil Flows,”
    AIAA Journal, Vol. 33, No. 1, January 1995, pp. 151-154.
  • “Analysis of Unsteady Airfoil Interference Effects Using a Zonal Navier-Stokes Solver,”
    AIAA Paper 95-0307, 33rd Aerospace Sciences Meeting, Reno, Nevada, 9-12 January 1995.
  • “Analysis of Low Reynolds Number Airfoil Flows,”
    Journal of Aircraft, Vol. 32, No. 3, May-June 1995, pp. 625-630.
  • “Numerical Investigation of the Stall Onset Behavior of the GA(W)-1 Airfoil,”
    Proc. 6th Int. Symposium on Computational Fluid Dynamics, Incline Village, NV, 4-8 September 1995, pp. 1052-1057.
  • “On the Navier-Stokes Calculation of Separation Bubbles with a New Transition Model,”
    ASME Paper 96-GT-487, 41st International Gas Turbine Congress, Birmingham, UK, 10-13 June 1996.
  • “Numerical Investigation of Transition and Hub Corner Stall Phenomena inside an Annular Compressor Cascade,”
    AIAA Paper 96-2655, 32nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Lake Buena Vista, Florida, 1-3 July 1996.
  • “Effect of Two-Dimensional Cavities on the Boundary Layer in an Adverse Pressure Gradient,”
     AIAA 97-0300, 35th Aerospace Sciences Meeting, January 6-10, 1997.
  • “On the Calculation of Laminar Separation Bubbles Using Different Transition Models,”
    ASME Paper 97-GT-453, International Gas Turbine Congress, Orlando, Florida, June 2-5, 1997.
  • “On the Navier-Stokes Calculation of Separation Bubbles with a New Transition Model,”
    ASME Journal of Turbomachinery, Vol. 120, 1998, pp. 36-42.
  • “Numerical Investigation of the Stall Onset Behaviour of the GA(W)-1 Airfoil,”
    Computers and Fluids, Vol. 27, Nos 5-6, 1998, pp. 681-687.

Vortex Flows

  • “A Dynamic Flow Visualization Study of a 2% F/A-18 Fighter Aircraft Model at High Angles of Attack,”
    Proc. NASA High Angle of Attack Technology Conference, Hampton, VA, October 30 -November 1, 1990
  • “Numerical Investigation of the Flow over a Double-Delta Wing at High Incidence,”
     AIAA Paper 91-0753, AIAA 29th Aerospace Sciences Meeting, Reno, Nevada, January 7-11, 1991
  • “A Water Tunnel Investigation of the Effects of Pitch Rate and Yaw on LEX Generated Vortices of an F/A-18 Fighter Aircraft Model,”
    AIAA Paper 91-0280, 29th Aerospace Sciences Meeting, Reno, Nevada, January 7-11, 1991
  • “Static and Dynamic Water Tunnel Flow Visualization Studies of a Canard Configured X-31A-Like Fighter Aircraft Model,”
    AIAA Paper 91-1629, AIAA 22nd Fluid Dynamics, Plasma Dynamics & Lasers Conference, Honolulu, Hawaii, June 24-26, 1991
  • “Water Tunnel Visualization of Dynamic Effects During Sideslipping of a Canard-Configured Fighter Model,”
    Proceedings of the Fifth Asian Congress of Fluid Mechanics, Taejon, Korea, pp. 1161-1164, August 10-14, 1992
  • “Pitch Rate/Sideslip Effects on LEX Vortices of an F/A-18 Aircraft Model,”
    Journal of Aircraft, Vol. 29, No. 4, July-August 1992, pp. 720-723
  • “Vortex Wake Investigation of a Twin-Tail Fighter Aircraft Model at High Angles of Attack with and without LEX Fences,”
     AIAA paper 93-0868, 31st Aerospace Sciences Meeting, Reno, Nevada, January 11-14, 1993
  • “Vortex Breakdown Studies of a Canard-Configured X31A-Like Fighter Aircraft Model,”
    Journal of Aircraft, Vol. 30, No. 3, May-June 1993, pp. 405-408
  • “Effect of Canard Oscillations on the Vortical Flowfield of a X-31A-Like Fighter Model,”
    AIAA Paper 93-3427, 11th AIAA Applied Aerodynamics Conference, Monterey, CA, August 9-11, 1993
  • “A Visualization Study of the Vortical Flow over a Double-Delta Wing in Dynamic Motion,”
    AIAA Paper 93-3425, 11th Applied Aerodynamics Conference, Monterey, CA, August 9-11, 1993
  • “Investigation into the Effects of Juncture Fillets on the Vortical Flow over a Cropped, Double-Delta Wing,”
    AIAA Paper 94-0626, 32nd Aerospace Sciences Meeting, January 10-13, 1994
  • “Experimental Investigation of Vortex Breakdown over a Sideslipping Canard-Configured Aircraft Model,”
    Journal of Aircraft, Vol. 31, No. 4, July-August 1994, pp. 998-991
  • “Experimental Investigation of Vortex Flow Control Using Juncture Fillets on a Cropped Double-Delta Wing,”
    AIAA Paper 95-0649, 33rd Aerospace Sciences Meeting, Reno, Nevada, 9-12 January 1995
  • “Effect of LEX Fences on the Vortex Wake of an F/A-18 Model,”
    Journal of Aircraft, Vol. 32, No. 3, May-June 1995, pp. 680-682
  • “Navier-Stokes Computation of the Flow over a Double-Delta Wing at High Incidence,”
    Journal of Aircraft, Vol. 32, No. 3, May-June 1995, pp. 457-463
  • “Effect of Canard Oscillations on an X-31A-Like Model in Pitching Maneuver,”
    Journal of Aircraft, Vol. 32, No. 5, September-October 1995, pp. 1157-1160
  • “Reynolds Number Effects on the Vortical Flow Structure Generated by a Double-Delta Wing,”
    Experiments in Fluids, Vol. 28, 2000, pp. 206-216
  • “Experimental Study of Vortex Flow Control on Double-Delta Wings Using Fillets,”
    Journal of Aircraft, Vol. 33, No. 4, July-August 1996, pp. 743-751
  • “Juncture Fillets for Vortex Flow Control on Double-Delta Wings Undergoing Sideslip,”
    AIAA Paper 96-0663, 34th Aerospace Sciences Meeting, Reno, Nevada, 15-18 January 1996
  • “Passive Control of Flow Separation over Delta Wings at High Angle of Attack,”
    AIAA Paper 96-0661, 34th Aerospace Sciences Meeting, Reno, Nevada, 15-18 January 1996
  • “A Computational Study of a Close-Coupled Delat Canard-Wing-Body Configuration,”
    AIAA 96-2440, 14 AIAA Applied Aerodynamics Conference, New Orleans, LA, June 17-20, 1996, pp. 498-504
  • “Control of High-Incidence Vortical Flow on Double-Delta Wings Undergoing Sideslip,”
    Journal of Aircraft, Vol. 33, No.4, July-August 1997, pp. 506-513
  • “Effect of Reynolds Number on High Incidence Flow over Double-Delta Wings,”
    AIAA 97-0046, 35th Aerospace Sciences Meeting, Reno, Nevada, January 6-10, 1997
  • “Computational Study of Subsonic Flow over a Delta Canard-Wing-Body Configuration,”
    Journal of Aircraft, Vol. 35, No. 4, July-August 1998, pp. 554-560