水平加熱平板上自然対流の伝熱促進法について

概要

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A new enhancement technique was developed for natural-convection heat transfer from a horizontal heated plate. The technique aims to increase the heat-transfer rate. For this purpose, rectangular grids of which the upper faces were exposed to an ambient fluid were installed on the heated plate. The grids inhibit the buoyant flow from the edges to the center of the heated plate and promote cellular motion within the grid. These two actions increase the heat-transfer coefficients of the heated plate, in particular, in the central portion of the grid. The maximum and the average heat-transfer coefficients within the grids were increased by 40% and 20%, respectively, compared to those for the smooth plate, when the grids with appropriate size and height were used. Further increase in the heat-transfer coefficients will be feasible by adopting high-conductivity grids.
社団法人日本機械学会の論文
1994-01-25