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Correlation Experience with the SAE Wind Tunnel Test Procedure for Trucks and Buses
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Abstract
Six-component aerodynamic force and moment data are compared from tests of four 1/10-scale truck models at four wind tunnels on the North American Continent. Each model was tested in both a standard and a fuel saver configuration.
The differences observed between tunnels were consistent for each aerodynamic component regardless of truck or configuration. The zero-yaw drag coefficients from each of the four tunnels were within ± 4 percent of the mean coefficients. The coefficient magnitudes for the other aerodynamic components showed variations that were often many times larger than those for drag. The variations between the incremental coefficients for all six aerodynamic components were less than those found for the coefficient magnitudes. A qualified comparison was made between the average drag coefficient magnitudes from the wind tunnels and those available from some on-road coastdown tests of the full-scale vehicles.
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Citation
Cooper, K., Mason, W., and Bettes, W., "Correlation Experience with the SAE Wind Tunnel Test Procedure for Trucks and Buses," SAE Technical Paper 820375, 1982, https://doi.org/10.4271/820375.Also In
References
- DOT/SAE Truck and Bus Fuel Economy Measurement Study Report P-59A October 1976
- SAE Wind Tunnel Test Procedure for Trucks and Buses - SAE J1252 August 1979
- Wardlaw R. L. “The National Aeronautical Establishment's 6 ft. × 9 ft. Low Speed Wind Tunnel,” Canadian Aeronautics and Space Journal 9 4 April 1963
- Mason, Wiliam T. Jr. Beebe Paul S. Schenkel Franz K. “An Aerodynamic Test Facility for Scale-Model Automobiles,” Paper 730238 presented at SAE International Automotive Engineering Congress Detroit January 8-12 1973 915 926
- Cooper K. R. “A Wind Tunnel Investigation into the Fuel Savings Available from the Aerodynamic Drag Reduction of Trucks,” DME/NAE Quarterly Bulletin No. 1976(3) National Aeronautical Establishment Ottawa, Canada October 1976
- Vogt C. R. Harold Ek C. Vehicle Correlation and Simulation Subcommittee SAE Committee Correspondence to W. H. Bettes Aerodynamics Subcommittee December 3 1980
- Bettes W. H. Kelly K. B. “The Influence of Wind Tunnel Solid Boundaries on Automotive Test Data,” Advances in Road Vehicle Aerodynamics 1973 Stephens H. S. Cranfield, Bedford, England BHRA Fluid Engineering 1973
- Kelly K. B. Provencher L. G. Schenkel F. K. “The General Motors Engineering Staff Aerodynamics Laboratory--A Full-Scale Automotive Wind Tunnel,” presented at SAE International Automotive Engineering Congress Detroit February 22-26 1982