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¼ Scale VehicleWake Pattern Analysis using Near-Wall PIV
Technical Paper
2006-01-1027
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
3-D Flow separations such as those that occur on the rear end of a vehicle have an impact on wall pressure distribution, hence on aerodynamic forces. The identification of these phenomena can be made through the analysis of skin friction patterns, which consist of the “footprints” of flow separations. These can be determined from qualitative and quantitative data obtained from near-wall PIV measurements. The wake flow of different configurations of a simplified 1/4 scale car model are analyzed. The influence of the slant angle and the Reynolds number on 3-D separated flow patterns and their induced pressure distribution is addressed, based on near-wall PIV, standard PIV and wall pressure measurements. This enables to understand how a topological change (the size or shape of a separation pattern) modifies the associated pressure distribution (therefore the drag coefficient). Finally, insights into instantaneous topology identification are presented.
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Citation
Depardon, S., Lasserre, J., Brizzi, L., and Borée, J., "¼ Scale VehicleWake Pattern Analysis using Near-Wall PIV," SAE Technical Paper 2006-01-1027, 2006, https://doi.org/10.4271/2006-01-1027.Also In
SAE 2006 Transactions Journal of Passenger Cars: Mechanical Systems
Number: V115-6; Published: 2007-03-30
Number: V115-6; Published: 2007-03-30
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