Strouhal numbers of unsteady flow structures around a simplified car model

B. F. Zhang; Suet To; Y. Zhou

doi:10.1007/978-3-642-40371-2_26

Strouhal numbers of unsteady flow structures around a simplified car model

B. F. Zhang, Suet To, Y. Zhou

Research output: Chapter in book / Conference proceeding › Chapter in an edited book (as author) › Academic research › peer-review

1 Citation (Scopus)

Abstract

This work aims to gain relatively thorough understanding of unsteady flow structures around an Ahmed body and associated predominated Strouhal numbers StAp based on the square root of the frontal area A. Extensive hotwire and flow visualization measurements were conducted in a wind tunnel at 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. StA=0:196 and 0.140 are detected above the roof. StA=0:196 is captured again over the rear window, along with another unsteady structure of StA=0:265. Behind the vertical base, the wake is dominated by the quasiperiodic structures of StA=0:442. A conceptual flow structure model is proposed based on the present data as well as those in the literature.

Original language	English
Title of host publication	Lecture Notes in Mechanical Engineering
Pages	179-184
Number of pages	6
DOIs	https://doi.org/10.1007/978-3-642-40371-2_26
Publication status	Published - 1 Jan 2014

Publication series

Name	Lecture Notes in Mechanical Engineering
Volume	8
ISSN (Print)	2195-4356
ISSN (Electronic)	2195-4364

ASJC Scopus subject areas

Automotive Engineering
Aerospace Engineering
Mechanical Engineering
Fluid Flow and Transfer Processes

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10.1007/978-3-642-40371-2_26

Cite this

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Strouhal numbers of unsteady flow structures around a simplified car model

Abstract

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