在长输管线工程设计中经常遇到局部干扰问题。通过实验,研究了组合后局部阻力系数ζ值的变化规律;证实了两弯头间的长径比,液体流经的方向和所在平面相互关系以及进口条件对ζ值的影响。提出了干扰修正系数C,可用于估算局部阻力干扰的水头损失。 In the long-distance pipeline engineering design often encountered the problem of local interference. The variation of the ζ value of the local resistance coefficient after the combination was studied through experiments. The relationship between the aspect ratio of the two elbows, the direction of the liquid flowing through the plane and the plane of the liquid and the influence of the inlet conditions on the ζ value were confirmed. The interference correction coefficient C is proposed, which can be used to estimate the head loss caused by local resistance interference.