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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/21527

Title: The study of a bi-stable wake region of a generic squareback vehicle using tomographic PIV
Authors: Perry, Anna K.
Almond, Mathew T.
Passmore, Martin A.
Littlewood, Rob
Issue Date: 2016
Publisher: © SAE International
Citation: PERRY, A.K. ... et al, 2016. The study of a bi-stable wake region of a generic squareback vehicle using tomographic PIV. SAE International Journal of Passenger Cars - Mechanical Systems, 9 (2), doi: 10.4271/2016-01-1610
Series/Report no.: SAE Technical Paper; 2016-01-1610
Abstract: This paper demonstrates the use of large scale tomographic PIV to study the wake region of a Windsor model. This forms part of a larger study intending to understand the mechanisms that drive drag force changes when rear end optimizations are applied. For the first time, tomographic PIV has been applied to a large airflow volume (0.125m3, 500 x 500 x 500mm), which is of sufficient size to capture the near wake of a 25% scale Windsor model in a single measurement. The measurement volume is illuminated using a 200mJ double pulsed Nd:Yag laser fitted with a volume optic and seeded with 300μm helium filled soap bubbles generated by a novel high output seeder. Images were captured using four 4M Pixel LaVision cameras. The tomographic results are shown to produce high quality data with the setup used, but further improvements and tests at higher Reynolds number could be conducted if an additional seeding rake was used to increase seeding density. Proper Orthogonal Decomposition (POD) was applied to both the 2D and tomographic data to show the presence of a bi-stable wake structure
Description: This paper was published in the journal SAE International Journal of Passenger Cars - Mechanical Systems and the definitive published version is available at http://dx.doi.org/10.4271/2016-01-1610
Version: Published
DOI: 10.4271/2016-01-1610
URI: https://dspace.lboro.ac.uk/2134/21527
Publisher Link: http://dx.doi.org/10.4271/2016-01-1610
ISSN: 1946-4002
Appears in Collections:Published Articles (Aeronautical and Automotive Engineering)

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