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Correlation Tests Between Japanese Full-Scale Automotive Wind Tunnels Using the Correction Methods for Drag Coefficient
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 11, 2005 by SAE International in United States
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This paper describes results of the correlation tests between several full-scale automotive wind tunnels in Japan. The tests were carried out during FY 2003 by members of the working group for wind tunnel correlation test, which was organized in JSAE Vehicle Aerodynamics Research Committee.
Five wind tunnels were selected, i.e., three open test section type wind tunnels and two closed ones. Four test models were selected, i.e., sedan, station wagon, minivan and hatch back car, all of which are current production models. Tests were done with EADE test conditions.
Correlation formulas for drag coefficient, which are based on the previous methods by Mercker and Wiedemann  and Mercker [3, 10] respectively for open and closed test section type wind tunnels, were used. Also considered were the differences of the boundary layer thickness between five wind tunnels.
Average standard deviations of CD values for the test models were modified from 0.007 to 0.005 among three open test section type wind tunnels by using the correlation formula. As for the closed test type, CD values with the wind tunnel of a moderate cross sectional area showed the similar result with open test section type, but those with rather small cross sectional area deviated from ones mentioned above.
CitationMaeda, K., Kitoh, K., Nozaki, H., Nambo, K. et al., "Correlation Tests Between Japanese Full-Scale Automotive Wind Tunnels Using the Correction Methods for Drag Coefficient," SAE Technical Paper 2005-01-1457, 2005, https://doi.org/10.4271/2005-01-1457.
- Aerodynamic Testing of Road Vehicles SAE Surface Vehicle Inform. Report J 2071 1990
- Glauert H. Wind Tunnel Interference of Wings, Bodies and Airscrews 1933
- Mercker E. A Blockage Correction for Automotive Testing in a Closed Wind Tunnel J. Wind Engineering and Industrial Aerodynamics 22 1985
- Hackett J.E. Wilsden D.J. Estimation of Wind Tunnel Blockage form Wall Pressure Signatures AIAA Paper 78-828 1978
- Maskell E.C. A Theory of Blockage Effects on Bluff Bodies and Stalled Wings in a Closed Wind Tunnel 1965
- Munk M. Some New Aerodynamic Relations N.A.C.A. Report 114 1921
- Glauert H. The Effect of a Static Pressure Gradient on the Drag of a Body Tested in a Wind Tunnel 1928
- Berndtsson A. et al. The Effect of Ground Plane Boundary Layer Control on Automotive Testing in a Wind Tunnel SAE Technical Paper 880248 1988
- Kausche G. Untersuchungen uber den Einfluss des Druckgradienten in Einer offenen Messstrecke auf die aerodynamischen Beiwerte eines KFZ-Modells 1986
- Cooper K.R. et al. Closed-Test-Section Wind Tunnel Blockage Corrections for Road Vehicles SAE SP-1176 Warrendale 1996
- Wiedemann J. et al. Der Audi Aero-Akustik Windkanal Internal Report AUDI AG, Dept. EOA 1993
- SAE Aerodynamic Testing of Road Vehicles, Closed-Test-Section Wind Tunnel Boundary Interference SAE Information Report J2085 1993
- Mercker E. Wiedemann J. On the Correction of Interference Effects in Open Jet Wind Tunnel SAE Paper 960671 1996
- Mercker E. Wickern G. Wiedemann J. Contemplation of Nozzle Blockage in Open Jet Wind Tunnel in View of Different Q-Determination Techniques SAE Paper 970136 Detroit 1997
- Wickern G. On the Application of Classical Wind Tunnel Corrections for Automotive Bodies SAE Paper 2001-01-0633 2001
- Buchheim R. Unger R. Carr G.W. Cogotti A. Kuhn A. Nilsson L.U. Comparison Tests between Major European Wind Tunnels SAE Paper 800140 1980
- Ishihara Y. Correction of Drag Coefficient (In the Case of Open Test Section), No.05-02 JSAE SYMPOSIUM ‘Vehicle Aerodynamics as a Key Technology to Further Advance Automotive Engineering in 21 st Century’, Paper 20024115 2002
- Takagi M. Correction Methods of Drag Coefficient in Closed Test Section Wind Tunnels, No.05-02 JSAE SYMPOSIUM ‘Vehicle Aerodynamics as a Key Technology to Further Advance Automotive Engineering in 21 st Century’, Paper 20024114 2002
- Imaizumi T. et al. Aerodynamic Test in Wind Tunnel with Moving Ground JSAE journal 51 4 51 56 1997