対向2面に粗面をもつ正方形流路内の乱流熱伝達

概要

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Experimental study was conducted on characteristics of the temperature field in forced convection turbulent heat transfer in a square duct with two opposite rib roughed walls. In particular, all three components of turbulent heat fluxes were measured by triple-wire probes, and they were compared with those obtained in a smooth walled square duct to examine the influence of rough walls on the transport process of heat and momentum in the duct. In the rough duct, both the turbulent heat fluxes and turbulent shear stresses are increased due to the turbulence-promotion effect of the rough wall. Near the smooth wall adjacent to the rough wall, the increase ratio of the turbulent heat flux relative to the smooth duct is larger than that of the turbulent shear stress. On the other hand, near the rough wall, the transport of heat by turbulence becomes less active than that of momentum, and this causes the dissimilarity between the distributions of the mean temperature and the primary flow velocity.
一般社団法人日本機械学会の論文
1999-11-25