2차원 90° 곡관에서 균일전단류의 특성에 대한 실험적 연구 (1) -평균유동장-An Experimental Study of Turbulent Uniform Shear Flow in a Nearly Two-Dimensional 90 Curved Duct (1) Mean Flow Field

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An experimental study is made in a nearly two-dimensional 90° curved duct to investigate the effects of interaction between streamline curvature and mean strain on turbulence. The initial shear at the entrance to the curved duct is varied by an upstream shear generator to produce five different shear conditions; a uniform flow(UF), a positive weak shear(PW), a positive strong shear(PS), a negative weak shear(NW) and a negative strong shear(NS). With the mean field data of the case UF, variations of the momentum thickness, the shape factor and the skin friction over the convex(inner) surface and the concave(outer) surface are scrutinized quantitatively in-depth. It is found that, while the pressure loss due to curvature is insensitive to the inlet shear rates, the distributions of wall static pressure along both convex and concave surfaces are much influenced by the inlet shear rates.
Publisher
대한기계학회
Issue Date
1995-03
Language
Korean
Citation

대한기계학회논문집 A, v.19, no.3, pp.834 - 845

ISSN
1226-4873
URI
http://hdl.handle.net/10203/76407
Appears in Collection
ME-Journal Papers(저널논문)
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