Bulletin of JSME
Online ISSN : 1881-1426
Print ISSN : 0021-3764
Influences of Roughness of Inner Surface of Pipe upon Pressure Drop due to Friction in Two-Phase Flow
Tetsuji KATSUHARA
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ジャーナル フリー

1959 年 2 巻 7 号 p. 439-445

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抄録
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 roughness, the ratio of pressure drop is written as follows : ΔPTP/(ΔPw)=(1-φd)-z where ΔPTP : pressure drop due to friction in two-phase flowing, ΔPw : that in water alone flowing, φd : dryness fraction, Z : value depending on 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 have been made clear. (3) The influences of roughness and inclination angle upon the ratio of the coefficient of friction are presented.
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© The Japan Society of Mechanical Engineers
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