硬質塩化ビニール管の摩擦係数

概要

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We have obtained the following relation by our measurments of the coefficient of frictonal resistance for a rigid vinyl chloride pipe. If we write a coefficient of frictional resistance of a vinyl pipe λ, velocity of water in a pipe v, and inner diameter of a pipe d, then we have λ=0.01381212v^<-0.268>×d^<-0.234> These relation is derived from [numerical formula] Where h is the head loss of a pipe, l is the length of a pipe and g is the acceleration of gravity. Coefficients of frictional resistance for different pipes are calculated from Rang's formula and their values are shown in the 4th table. If we compared the value of coefficient of frictional resistance for rigid vinyl chloride pipe with that of other pipes, the value of coefficient for a rigid vinyl chloride pipe is less than that of rough pipes such as new cast iron pipe etc, while it is bigger than that of smooth pipes made of glass, lead and zinc etc.
千葉大学の論文
1959-12-31