Prediction of Heat Transfer Deterioration in Turbulent Swirling Pipe Flow

概要

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numerical predictions were compared with the experiments of turbulent heat transfer in a pipe where the swirl flow is induced by the pipe wall rotating around the pipe axis. The heat transfer deterioration due to the swirl observed in the experiments was well predicted by the calculations applying the stress/flux equation model. The laminarization phenomena which indicate the laminar-like axial velocity profile due to the swirl were also predicted. It was revealed that the heat transfer deterioration and the laminarization phenomena are caused by the additional production terms including tangential velocity component due to swirl in transport equations of radial turbulent fluxes of momentum and heat. The additional production terms have significant effects of suppression on the turbulent transport of heat and momentum.
一般社団法人日本機械学会の論文
1988-11-15