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Boundary Layer

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Drag Reduction

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Rolling Hills Research Corporation

Copyright @2014

All Rights Reserved

 

 

Dr. Michael Kerho

Chief Aerodynamicist

 

 

Education                -  BS Aerospace Engineering

                                   The University of Southern California, 1989

                               -  MS Aeronautical and Astronautical Engineering

                                   The University of Illinois at Urbana-Champaign, 1992

                               -  Ph. D Aeronautical and Astronautical Engineering

                                   The University of Illinois at Urbana-Champaign, 1995  

Experience

Dr. Kerho has an extensive hands-on experimental and applied aerodynamics background.  His experimental experience encompasses the low speed through transonic flight regimes and includes test planning, model design and data acquisition, final reduction, flight correlation, and statistical quality analysis.  Dr. Kerho’s testing experience encompasses tunnel calibration, boundary layer and transition work, airfoil and aircraft development, and unsteady testing.  He has hands-on experience with Laser Doppler Velocimetry, electronically scanned pressure systems, hot-wire and hot-film anemometry systems, strain gage force/moment balance systems, and flow visualization methods including fluorescent dye and oil techniques, neutrally buoyant bubble applications, laser techniques, smoke and tuft methods, and temperature sensitive paint.

In addition to his experimental background, Dr. Kerho has computational experience with inverse airfoil design codes, 3-D panel, and overset Navier-Stokes CFD codes encompassing simple 2-D airfoils to full configuration 3-D aircraft.  The programs Dr. Kerho has been involved in have allowed him to contribute to a wide range of problems encompassing small aircraft through large transport and military designs.  Beginning in 1989 while at the University of Southern California, Dr. Kerho worked with low Reynolds number airfoil designs in an experimental study to alleviate the presence of laminar separation bubbles using sub-boundary layer vortex generators.  While at the University of Illinois at Urbana-Champaign Dr. Kerho performed extensive experimental and computational studies of the effects of ice accretion on airfoil and aircraft aerodynamics and performance under grants from NASA Lewis Research center.  These studies included intensive boundary layer and transition work on low speed airfoil designs with iced, artificially roughened, and clean configurations.  As a senior engineer/scientist at McDonnell Douglas/The Boeing Company, Dr. Kerho managed test campaigns for advanced transport and military aircraft for both subsonic and transonic flight regimes and performed analytical and experimental investigations of aircraft from conceptual design through testing.  He performed extensive CFD and wind tunnel to flight correlation studies and developed statistical data reduction and simulation software.  While at Rolling Hills Research Corporation, Dr. Kerho was been involved in the Phase I and enhanced pressure recovery NLF research and headed the Phase II NLF airfoil research.  In addition, he was involved in a Phase II SBIR sponsored by the U.S. Air Force in active turbulent drag reduction using MEMS.  Currently, Dr. Kerho is the Principal Investigator for a Phase II SBIR sponsored by NASA Dryden to develop a stagnation point control compliant trailing-edge NLF airfoil for radically enhanced performance NLF wings, and the Principle Investigator for a Phase II SBIR sponsored by the Army Research Laboratory to use robust flow control to alleviate dynamic stall in helicopter blades.  In addition to his SBIR work, Dr. Kerho has been responsible for developing several fundamental fluid dynamic experiments for the Rolling Hills Research Corporation line of water tunnels.  Dr. Kerho is the author of several journal and conference publications.  Dr. Kerho is also an AIAA Associate Fellow, member of the AIAA applied aerodynamics technical committee, chair of the subcommittee on design, and reviewer for the AIAA Journal of Aircraft.

Selected Publications

Kerho, M. F., “Enhanced Airfoil Design Incorporating Boundary Layer Mixing Devices,” AIAA-2003-0211, paper presented at the 41st AIAA Aerospace Sciences Meeting and Exhibit, 6-9 January, 2003, Reno, NV.

Kerho, M. F., “Active Reduction of Skin Friction Drag Using Low-Speed Streak Control (Invited),” AIAA 2002-0271, paper presented at the 40th AIAA Aerospace Sciences Meeting and Exhibit, 14-17 January, 2002, Reno, NV.

Kerho, M. F., Heid, J, Kramer, B, and Ng, T., “Active Drag Reduction Using Selective Low Rate Suction,” Paper # 2000-4018, 18th Applied Aerodynamics Conference, Denver, Colorado, 14-17 August 2000.

Kerho, M.F., and Bragg, M.B., “Airfoil Boundary-Layer Development and Transition with Large Leading-Edge Roughness,” AIAA Journal, Vol. 35, No. 1, 1997, pp. 75-84.

Kerho, M., Hutcherson, S., Blackwelder, R.F., and Liebeck, R.H., "Vortex Generators Used To Control Laminar Separation Bubbles,"  AIAA Journal of Aircraft, Vol. 30, No. 3, 1993, pp.315-319.

 

 

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