Surface flow and wake characteristics of automotive external rear-view mirror

Title
Surface flow and wake characteristics of automotive external rear-view mirror
Author(s)
한용운김정현[김정현]박병호[박병호]
Keywords
NOISE
Issue Date
201111
Publisher
SAGE PUBLICATIONS LTD
Citation
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING, v.225, no.D12, pp.1605 - 1613
Abstract
To observe surface flow and wake structure around an automotive external rear-view mirror, the pressure distribution over the mirror skin and the velocity vector fields in the cross-sectional planes were measured using a pressure scanning system and hot-wire anemometry in a blow-down wind tunnel. Surface flow visualization was also used to investigate boundary layer flow over the mirror surface. It was found that the pressure coefficient became negative over the whole of the surface area, with the exception of the proximity of the stagnation point of the mirror housing, implying the surface flow acceleration along the curved mirror contour. The minimum pressure on the surface of the mirror glass appeared near the outside edge region, which seemed to be the origin of the vortex envelope. Velocity vector fields showed that a conical envelope of the vortex sheet developed with its centre trailing toward the body frame. It was also demonstrated that visualizations over the mirror housing surface and the driver side vehicle skin show good agreement with the pressure distribution of the mirror housing surface and the trail of the vortex sheet in the mirror wake.
URI
http://hdl.handle.net/YU.REPOSITORY/24261http://dx.doi.org/10.1177/0954407011411377
ISSN
0954-4070
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공과대학 > 기계공학부 > Articles
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