おう壁上の乱流境界層に関する研究 : 第5報,正の圧力こう配に伴う乱流場の変化

概要

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Turbulent shear flows over a concave surface in an actual turbomachine are subjected both to streamline curvature and to a pressure gradient. The purpose of the present paper is to investigate experimentally the boundary layer flow over a concave surface with a positive pressure gradient at the onset of curvature. Measurements of the Reynolds stresses and the triple products of the velocity fluctuations are made. The acceleration parameter K is set to the order of -1.0×10^<-6> near the onset of curvature. A large change in the Reynolds stresses and the triple products due to the positive pressure gradient is found. The Reynolds stress <u^2>^^^- is mostly influenced by the pressure gradient, and has a peak apart from the surface.
一般社団法人日本機械学会の論文
1988-04-25