正三角形断面管路内助走区間発達乱流場の再配分化現象解析

概要

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A numerical analysis has been performed for three-dimensional developing turbulent flow in an equilateral duct by a modified Reynolds stress equation model. Governing equations are transformed from the physical plane to the calculation plane by boundary-fitted coordinate systems. Special attention was paid to the developing process of secondary flow of the second kind and redistribution process of turbulent energy. The calculated results suggest that the secondary flow of the second kind is generated in a corner region by anisotropy turbulence and it has maximum value at which momentum transfer is caused actively by interaction with the boundary layer. In addition, it was clarified that the interaction terms of mean strain and fluctuating velocities played more important roles in the redistribution process than the interaction term of fluctuating velocities.
一般社団法人日本機械学会の論文
1992-02-25