1面に粗面をもつ正方形流路内の乱流熱伝達 : 熱工学, 内燃機関, 動力など

概要

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Characteristics of the temperature field in forced convection turbulent heat transfer in a square duct with one rib-roughened wall have been investigated experimentally. Distributions of the mean temperature, primary flow velocity, intensities of the fluctuating temperature and velocity, correlation coefficients between the fluctuating temperature and velocity components, turbulent heat fluxes and turbulent shear stresses were measured, and they were compared with those obtained in a smooth-walled square duct to examine the influence of the rough wall on the characteristics of the temperature field. Near the rough wall, a weak dissimilarity appeared between the mean temperature field and the mean velocity field ; this suggested that the transport of heat by turbulence becomes less active than that of the momentum there. Based on the measured results, the mechanism of this dissimilarity in the mean fields was examined by evaluating the production terms in the transport equations of <u_1^2>^^- and <t^2>^^-.
一般社団法人日本機械学会の論文
2001-01-25