噴霧状気液二相衝突噴流を伴う平板のしみ出し冷却に関する実験的研究

概要

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A porous plate, which was cooled with water sprays, was horizontally placed parallel to a hot air stream. The air jets used to atomize the water were impinged on the back surface of the porous plate to increase the heat transfer coefficient and penetrated into the porous plate as a coolant, while the water also penetrated the porous plate and evaporated in it. The temporature distributions on both sides of the porous plate were measured by thermocouples. The temperature of the main stream and the mass fluxes of cooling air and water were varied in the range of 100〜300℃, (0.95〜5.70)×10^<-2>kg/(m^2・s) and (0〜1.6)×10^<-3>kg/(m^2・s), respectively, with the main strean being kept at a fixed velocity of 10m/s. The transpiration cooling effectiveness increases with increasing mass fluxes of water and air. The experimental results can be expressed by an empirical formula which is a function of a modified blowing parameter taking account of the latent heat of evaporation. The maximum and mean errors of the formula are 8.8% and 2.9%, respectively.
社団法人日本機械学会の論文
1991-03-25