気水二相流の摩擦損失に及ぼす管内面あらさの影響

概要

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In this paper, the author has experimentally investigated the influences of the roughness of the inner surface of pipe upon the pressure drop due to friction in two-phase flow of the mixture of air and water in inclined and vertical pipes. The results of investigation may be summarized as follows : (1) For the wide range of the roughness, the ratio of pressure drop is written as follows : [numerical formula] where ΔP_<TP> pressure drop due to friction in two-phase flowing, ΔP_w that in water alone flowing, φ_d dryness fraction, Z value decided by the roughness and inclination angle of pipe. (2) The variations of the values of Z due to the roughness of inner surface and the inclination angle of pipe been clarified. (3) The influences of roughness and inclination angle upon the ratio of the coefficient of friction are presented.
一般社団法人日本機械学会の論文
1958-12-25