水电能源科学

为研究管道流量、关阀时间和关阀方式对水锤压力的影响，针对某长距离多支线重力流输水管道，采用特征线法及FORTRAN算法建立相应的水锤计算模型，选取支线以线性关闭方案关闭阀门。结果表明，适当地延长关阀时间可以有效降低管道水锤压力；压差与流量成正比，当初始压力恒定时，随着流量的不断增大，管道及阀前最大压力均逐渐增大；各支线阀门同时关闭时的水锤压力远大于阀门依次关闭时的水锤压力。研究结果可为类似的长距离多支线重力流输水工程的水锤防护提供参考依据。

In order to study the influence of pipeline flow, valve closing time and valve closing mode on water hammer pressure, the characteristic line method and FORTRAN algorithm were used to establish the corresponding water hammer computational model for a long-distance multi-branch gravity flow pipeline. And then the valve with linear closing scheme was chosen to close the branch line. The results show that appropriate extension of the valve closing time can effectively reduce the pipeline water hammer pressure; Differential pressure is proportional to the flow rate. When the initial pressure is constant, with increase of flow rate, the maximum pressure in front of the pipeline and the valve gradually increase; The water hammer pressure when all branch valves are closed simultaneously is much greater than that when the valves are closed in sequence. The study can provide a reference basis for water hammer protection in similar long-distance multi-branch gravity flow water diversion projects.