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在进行管路水力计算时,通常推荐谢才公式、哈森——威廉斯(Hazen—Williams)公式、斯柯贝(Scobey)公式来计算管路沿程损失;这三个公式是国外通过实验得出的经验公式,现在还被广泛采用,但在实际计算中,用上述三个公式计算的数值与目前国内通过实验所得的数值比较普遍偏大,影响计算正确性,因而增加工程设备投资。本文主要通过大量试验所得的管路沿程损失计算方程式与计算数值来分析、探讨三个公式的计算正确性,并在此基础上推荐修正这三个公式中的粗糙度系数及管材摩擦系数,以供设计使用者参考。
In the pipeline hydraulic calculation, it is usually recommended Xie formula, the Hazen-Williams formula, Scobey formula to calculate the pipeline loss along the pipeline; these three formulas are experimentally obtained However, in the actual calculation, the numerical values calculated by the above three formulas are generally larger than the current numerical values obtained through experiments in the country, which affects the correctness of calculation and thus increases the investment in engineering equipment. In this paper, a large number of tests obtained by the pipeline along the equation of calculation and calculation of loss to analyze the calculation of the correctness of the three formulas, and on the basis of these three formulas recommended to amend the roughness coefficient and pipe friction coefficient, For the design user’s reference.