燃气管网水力计算摩阻系数计算公式的选用

Selection of the Equation of the Value of Friction-factor for the Hydraulic Calculation of Gas Distribution Net

本文针对铸铁管和钢管的几种典型当量粗糙度和常用管径对燃气输配管网摩阻系数λ的各种计算方法进行了大量的试算。并对其结果进行综合分析,认为当量粗糙度对λ值计算的影响不容忽视,并对电算和手算分别推荐了相应的计算公式。

The paper relates to calculations with various methods in accordance with relations between the typical equivalent roughness and ordinary pipe diameter for steel tube and iron tube, respectively. A comprehensive analysis of the result of these calculations obtained indicates that the effect of the equivalent roughness on the value could not be ignored. Some appropriate equations for the calculation by computer or by manual computation were introduced.