円管内旋回乱流における流動および運動量輸送の予測解析

概要

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Numerical predictions are compared with the experiments of turbulent swirling flow in a stationary pipe. Two kinds of turbulence models, the k-ε two equation model and the stress equation model, are applied in the present calculations. The applicability of the turbulence models is tested. The characteristics of axial and tangential velocity profile in the presence of the swirl can be predicted by applying the stress equation turbulence model, whereas the k-ε two equation model fails to predict this. The comprehensible interpretations of the phenomena, especially the retardation of the turbulent transport of momentum due to the swirl, are presented. The suppression of the transport of axial momentum in the radial direction is caused by the additional production term, including the tangential velocity component .The anisotropy of Reynolds normal stresses has the effect of transporting the tangential momentum towards the central axis.
一般社団法人日本機械学会の論文
1988-08-25