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Title: Strouhal numbers of unsteady flow structures around a simolified car model
Authors: Zhang, BF
To, S 
Zhou, Y
Issue Date: 2014
Publisher: Springer
Source: Lecture notes in mechanical engineering, 2014, p. 179-184 How to cite?
Journal: Lecture notes in mechanical engineering 
Abstract: This work aims to gain relatively thorough understanding of unsteady flow structures around an Ahmed body and associated predominated Strouhal numbers St A √StA based on the square root of the frontal area A. Extensive hotwire and flow visualization measurements were conducted in a wind tunnel at Re A √ =6.59×10 4 ReA=6.59×104 over the roof, the rear window, and behind the vertical base of this body with a slant angle of 25°. Four distinct Strouhal numbers have been identified. St A √ =0.196 StA=0.196 and 0.140 are detected above the roof. St A √ =0.196 StA=0.196 is captured again over the rear window, along with another unsteady structure of St A √ =0.265 StA=0.265 . Behind the vertical base, the wake is dominated by the quasi-periodic structures of St A √ =0.442 StA=0.442 . A conceptual flow structure model is proposed based on the present data as well as those in the literature.
Description: 2nd Symposium on Fluid- Struture-Sound Interactions and Control, Hong Kong & Macau, 20-23 May 2013
ISBN: 978-3-642-40370-5 (print)
978-3-642-40371-2 (online)
ISSN: 2195-4356
EISSN: 2195-4364
DOI: 10.1007/978-3-642-40371-2_26
Appears in Collections:Conference Paper

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