加熱壁面上に設置された円柱列下流の強制対流熱伝達

概要

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The heat transfer effect of a cylinder array placed near a heated wall was studied experimentally. Changing the number of the cylinders, distributions of flow velocity and temperature were measured in disturbed boundary layers. Augmentation of the local heat transfer was investigated in relation with those measured distributions. Because of the effect of cylinders, thermal boundary layer thickness becomes thicker with the increasing thickness of velocity boundary layer. It causes temperature drop at the wall. As a result, the heat transfer coefficient is enhanced. The experimental results showed (1)Both thickness of velocity boundary layer and thermal boundary layer was increased in the same way. (2)Heat transfer coefficient was improved with the increase of boundary layer thickness. (3)The log-law region was restored with decay of the velocity deficit of the cylinder array.
明石工業高等専門学校の論文