This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Wake Surveys of Different Car-Body Shapes with Coloured Isopressure Maps
Annotation ability available
Sector:
Language:
English
Abstract
A technique to map the wake behind passenger cars with different rear end configurations has been developed in the full-scale automotive wind tunnel “Pininfarina”.
It is based on the measurement of total pressure in the wake, using a probe which is driven by a large traversing gear.
Results are presented as coloured isopressure maps.
Tests have been carried out on a 1:2.5 scale car model with two different front ends and eight different rear ends. The attainable body configurations are likely to cover the majority of passenger car shapes.
Wake surveys have been conducted at several distances behind each car model in order to see the wake development. The paper shows and analyzes the results obtained for these sixteen car model configurations; it also emphasizes what kind of information can be obtained by this wake survey technique.
Recommended Content
Authors
Citation
Cogotti, A., "Wake Surveys of Different Car-Body Shapes with Coloured Isopressure Maps," SAE Technical Paper 840299, 1984, https://doi.org/10.4271/840299.Also In
Automobile Aerodynamics; Wakes, Wind Effect, Vehicle Development
Number: SP-0569; Published: 1984-03-01
Number: SP-0569; Published: 1984-03-01
References
- CNR/Pininfarina Progetto Finalizzato Energetica “Aerodynamic correlation between road-wind tunnel-computer” Contract No. 80.00883.92 1980
- CNR/Pininfarina Progetto Finalizzato Trasporti Sottoprogetto IV “Trasporti su strada” “Aerodinamica dei veicoli terrestri” Contract No. 82.00052.93 1982
- Crowder J. P. “Quick and easy flow-field surveys” p” 38 Astronatics and Aeronautics October 1980
- Cogotti A. “A passenger car wake survey using coloured isopressure maps” Third International Symposium on Flow Visualization September 6-9, 1983
- Morelli A. “General layout characteristics and performance of a new wind tunnel for aerodynamic and functional tests on full-scale vehicles” SAE paper No. 710214 January 11-15 1971
- Cogotti A. Buchheim R. Garrone A. Kuhn A. “Comparison tests between some full-scale European automotive wind tunnels - Pininfarina reference car” SAE paper No. 800139 February 25-29 1980
- Pininfarina S. “Vehicle aerodynamics - The design management point of view” SAE panel discussion March 1 1983 ATA July/August 1983
- Cogotti A. “Passenger car wake flow visualization” SATA meeting - April 20, 1983