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Scale-Model Tests on the Test Section of the Chrysler Slotted-Wall Automotive Wind Tunnel
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English
Abstract
The Chrysler Corporation is currently in the aerodynamic design phase of a slotted-wall automotive wind tunnel. This wind tunnel, with a 12-ft high by 20-ft wide test-section, is designed for aerodynamic, thermodynamic, and acoustic testing, and has a slotted-wall test section to minimize wall-interference effects. 1/12-scale tests were conducted on test sections with lengths of 51, 65, and 72 in. to determine the acceptable length of a slotted-wall test section having both turntable and dynamometer test positions. The effect of test-section length on the magnitude of the model pressure errors and the reference-speed correction required at the model and dynamometer positions, as well as the influence of the re-entry flaps on the test-section pressure gradient and on vehicle wake-development at the dynamometer position, were investigated.
A test-section length of 72 in. (72 ft full-scale) was selected, based on the test results. This test-section length produced adequate wake-development at both the turntable and dynamometer positions.
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Citation
Goenka, L., "Scale-Model Tests on the Test Section of the Chrysler Slotted-Wall Automotive Wind Tunnel," SAE Technical Paper 910313, 1991, https://doi.org/10.4271/910313.Also In
References
- Flay, R. J. F. Elfstrom, G. M. Clark, P. J. F. “Slotted-Wall Test Sections for Automotive Aerodynamic Tests at Yaw,” SAE Paper 830302 March 1983
- Goenka, L. N. “A Numerical Model to Determine Vehicle Pressure-Simulation Accuracy in a Slotted-Wall Automotive Wind Tunnel,” SAE Paper 900188 Feb. 1990
- Whitfield, J. D. Jacocks, J. L. Dietz, W. E. Pate, S. R. “Demonstration of the Adaptive-Wall Concept Applied to an Automotive Wind Tunnel,” SAE Paper 820373 March 1982