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Advantages of Adaptive Wall Wind Tunnel Technology: A CFD Study for Testing Open Wheel Race Cars
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 16, 2007 by SAE International in United States
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The primary advantage of an Adaptive Wall wind tunnel is that the test section walls and ceiling are contoured to closely approximate the ‘open road' flowfield around the test vehicle. This reproduction of the open road flowfield then results in aerodynamic forces and moments on the test vehicle that are consistent with actual open road forces and moments. Aerodynamic data measured in the adaptive wall test section do not require blockage corrections for adjusting the data to open road results.
Extensive full scale experiments, published scale model studies, and Computational Fluid Dynamics (CFD) studies have verified the simulation capability of adaptive wall technology. For the CFD study described here, high-downforce, open-wheel race cars were studied. The numerical simulations with a race car in an Adaptive Wall Test Section (AWTS) wind tunnel are compared with simulations in ‘free air' condition and in a closed wall test section. Wind tunnel simulation fidelity is quantified by comparing aerodynamic drag, downforce, and pitching moment values obtained in the wind tunnels to those values obtained on the open road.
Practical advantages of the Adaptive Wall Test Section configuration are also discussed. These include reduced wind tunnel power requirements resulting in operational savings, full optical access around the vehicle that supports the use of advanced measurement methods such as PIV and PSP, and the ability to study realistic aero-elastic effects on wings and other vehicle components.
CitationDuell, E., Connor, C., Martindale, B., Walter, J. et al., "Advantages of Adaptive Wall Wind Tunnel Technology: A CFD Study for Testing Open Wheel Race Cars," SAE Technical Paper 2007-01-1048, 2007, https://doi.org/10.4271/2007-01-1048.
- Connor C. Kharazi A. Walter J. Martindale B. “Comparison of Wind Tunnel Configurations for Testing Closed-Wheel Race Cars: A CFD Study” SAE Paper, 2006-01-3620 , SAE Motorsports Conference December 2006
- Hucho W. 1998 Aerodynamics of Road Vehicles 4th SAE International, Warrendale, Pa, Chapter 13
- Arnette S. A. Martindale B. 2000 “Advances in Wind Tunnel Aerodynamics for Motorsport Testing, ” SAE Paper No. 2000-01-3549
- Mort K. W. Engelbert D. F. Dusterberry J. C. “Status and Capabilities of the 40 by 80 foot Wind Tunnel Modification” AIAA82-0607 1982
- Kelly K. B. Provencher L. G. Schenkel F.K. “The General Motors Engineering Staff Aerodynamics Laboratory - A Full-Scale Automotive Wind Tunnel” SAE paper 820371 1982
- Barlow J. B. Rae W. H Pope A. 1999 Low-Speed Wind Tunnel Testing 3rd John Wiley and Sons New York, NY.
- Cooper K. 1996 “Closed-Test-Section Wind Tunnel Corrections for Road Vehicles, ” SAE SP1176
- Wickern G. 2001 “On the Application of Classical Wind tunnel Corrections for Automotive Bodies, ” SAE Paper No. 2001-01-0633
- Mercker E. Wickern G. Wiedemann J. 1997 “Contemplation of Nozzle Blockage in Open Jet Wind-Tunnels in View of Different ‘Q' Determination Techniques, ” SAE Paper No. 970136
- Wiedemann J. Fischer O. Jiabin P. 2004 “Further Investigations on Gradient Effects, ” SAE Paper No. 2004-01-0670
- Whitfield J. D. Jacocks J. L. Dietz W. E. Pate S. R. 1982 “Demonstration of the Adaptive Wall Concept Applied to an Automotive Wind Tunnel, ” AIAA Paper 82-0584
- Wood R. McK. 1944 “Streamline Walls in High Speed Wind Tunnels” ARC Aerodynamics SubCommittee no 7332 (T.P. 11)
- Sears W. R. 1973 “Self Correcting Wind Tunnels” Aeronaut Journal 78 80 89
- Sears W. R. Vidal R. J. Erickson J. C. 1977 “Interference Free Wind Tunnel Flows by Adaptive Wall Technology” Aeronaut Journal 14 1042 1050
- Wedemeyer E. Lamarche L. 1988 “The Use of the 2D Adaptive Wall Test Sections for 3D Flows” AIAA 88-2041
- Wolf SWD. 1995 “Adaptive wall Technology for Improved Wind Tunnel Testing Technique-a Review” Progress Aerospace Sciences 31 31 85
- Meyer O. Nitsche W. 2004 “Update on the Progress in Adaptive Wind Tunnel Wall Technology” Progress in Aerospace Sciences 40 119 141
- Whitfield J. D. Jacocks J. L. Dietz W. E. Pate S. R. 1982 “Demonstration of the Adaptive-Wall Concept Applied to an Automotive Wind Tunnel, ” SAE Paper 820373
- Goenka L. N. Varner M. O. 1990 “Studies Supporting the Development of an Automotive Adaptive-Wall Wind Tunnel, ” SAE Paper 900320
- Jacocks J. Adaptive Automatic Wall Wind Tunnel United State Patent # 4, 308, 748 1982
- Walter J. A. Canacci V. Rout R. K. Koester W. Williams J. Walter T. M. Jacob S. Nagle P. A. 2005 “Uncertainty Analysis of Aerodynamic Coefficients in an Automotive Wind Tunnel, ” SAE Paper No. 2005-01-0870
- Roy J. P. Landman D. “Aerodynamic Characterization of a Sportscar Prototype Racecar Using Design of Experiments in a Wind Tunnel Test, ” 2006 SAE Paper No. 2006-01-3621
- Hoffman J. Martindale B. Arnette S. Williams J. Wallis S. 2001 “Effect of Test Section Configuration on Aerodynamic Drag Measurements, ” SAE Paper No. 2001-01-0631
- Hoffman J. Martindale B. Arnette S. Williams J. Wallis S. 2003 “Development of Lift and Drag Corrections for Open Jet Wind Tunnel Tests for an Extended Range of Vehicle Shapes, ” SAE Paper No. 2003-01-0934
- Romberg G. F. Gunn J. A. Lutz R. G. 1994 “The Chrysler 3/8-Scale Pilot Wind Tunnel” SAE Paper No. 94-0416
- Perzon S. 2001 “On Blockage Effects in Wind Tunnels - a CFD Study, ” SAE Paper No. 2001-01-0705
- Lindener N. 1999 “Aerodynamic Testing of Road Vehicles in Open Jet Wind Tunnels” SAE SP 1465
- Hoffman J. M. Arnette S. A. Porter C. B. Sung B. Arik B. E. “Application of Particle Image Velocimetry in the Korea Aerospace Research Institute Low Speed Wind Tunnel, ” AIAA-2000-0411 2000
- Coleman P. Wallis S. Dale G. Jordan J. Watkins N. Goss L. Davis J. Walter T. “A Comparison of Pressure Sensitive Paint (PSP) Techniques for Aerodynamic Testing at Slow Velocities” SAE Paper No. 2002-01-0255 2002
- Duell E. Everstine D. Mehta R. Bell J. Perry M. “Pressure Sensitive Paint Technology Applied to Low Speed Automotive Testing, ” SAE Paper 2001-01-0626 , 2001 SAE Congress March 2001