Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/8510
Title: Three-dimensional flow structure measurements behind a queue of studied model vehicles
Authors: Huang, JF
Chan, TL 
Zhou, Y
Keywords: Flow structures
Particle imaging velocimetry
Vehicle wake
Wind tunnel
Issue Date: 2009
Publisher: Elsevier
Source: International journal of heat and fluid flow, 2009, v. 30, no. 4, p. 647-657 How to cite?
Journal: International journal of heat and fluid flow 
Abstract: The three-dimensional flow structures of a queue of studied model vehicles (i.e., one-, two- and three-vehicle cases) were investigated comprehensively in a closed-circuit wind tunnel using particle image velocimetry (PIV) for the typical urban vehicle speeds (i.e., 10, 30 and 50 km/h). In this three-dimensional vehicle wake, a pair of longitudinal vortices is characterized by counter-rotating and moving downstream at relatively low velocity than their surrounding flow. The flow structures of multiple studied model vehicles are dominated by the wake generated from the last studied model vehicle but the preceding studied model vehicle(s) also has/have some minor effects. Cross-sectional turbulence distribution is non-uniform in the far-wake region for all studied cases. The lowest turbulence occurs at the center part of the vehicle wake while high turbulence occurs at its two sides. As such, it may lead to considerable underestimation in turbulence magnitude if the measurement is only taken along the centerline of the vehicle wake.
URI: http://hdl.handle.net/10397/8510
ISSN: 0142-727X
DOI: 10.1016/j.ijheatfluidflow.2009.03.010
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