AERODYNAMIC TESTING OF ROAD VEHICLES - OPEN THROAT WIND TUNNEL ADJUSTMENT
- Ground Vehicle Standard
- J2071_199406
- Revised
Scope
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a
Flow quality
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b
Determination of the reference dynamic pressure
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c
Wind tunnel floor boundary layer
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d
Test section geometry and position of the car within that geometry
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e
Shape of the vehicle
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f
Blockage ratio: The ratio of the cross-sectional area of the vehicle to the cross-sectional area of the wind tunnel nozzle
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g
Wheel rotation
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h
Internal flow in the model
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a
Design data of open throat wind tunnels
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b
A summary of published and unpublished test data
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c
Documentation and theoretical explanation of various blockage correction procedures for automotive tests
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d
Critical evaluation of blockage correction procedures, especially in relation to other influences, such as test section geometry, position of the car, floor boundary layer, etc.
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e
Recommendation of a calibration procedure to determine the effect of blockage and other influences in each individual wind tunnel
Rationale
Recommended Content
Data Sets - Support Documents
Title | Description | Download |
---|---|---|
TABLE 1 | FLOW QUALITY FOR OPEN THROAT TEST SECTIONS - EXISTING MINIMUM REQUIREMENT | |
TABLE 2 | OPEN TEST SECTION GEOMETRY OF LARGE TUNNELS (FOR FULL-SCALE TESTING) | |
TABLE 3 | OPEN TEST SECTION GEOMETRY OF SMALL TUNNELS (FOR SCALE MODEL TESTING) | |
Unnamed Dataset 4 | ||
TABLE 4 | SQUARE PLATE DIMENSIONS | |
Unnamed Dataset 6 | ||
TABLE 5 | FLAT PLATE MOUNTING DETAILS | |
TABLE 6 | PRINCIPAL DIMENSIONS OF MIRA REFERENCE MODELS (SEE ALSO ) | |
TABLE 7 | WIND TUNNEL SPECIFICATIONS TEST SECTION DIMENSIONS MOUNTING DETAILS | |
Unnamed Dataset 10 | ||
Unnamed Dataset 11 |
Issuing Committee
Road Vehicle Aerodynamics Forum Committee
The Road Vehicle Aerodynamics Forum Committee (RVAC) reports to the Vehicle Engineering Systems Group of the Motor Vehicle Council. The Committee is responsible for developing and maintaining SAE Standards, Technical Papers, and Special Publications related to road vehicle aerodynamics and wind noise performance and test techniques. The Wind Noise Measurement Standards Subcommittee has been developed under the RVAC scope to provide an international forum for industry and academia to encourage the exchange of ideas and progress relating to automotive wind noise, encompassing occupant perception of wind noise, experimental methods and facilities, numerical simulation, and other methods of wind noise prediction and optimization. Participants in the SAE Road Vehicle Aerodynamics Forum Committee include OEMs, suppliers, consulting firms, government, and other interested parties.