Water hammer protection for diversion systems in front of pumps in long-distance water supply projects  

作　　者：Lin Shi Jian Zhang Xiao-dong Yu Sheng Chen Wen-long Zhao Xu-yun Chen 

机构地区：[1]College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China

出　　处：《Water Science and Engineering》2023年第2期211-218,共8页水科学与水工程（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grants No.52179062 and 51879087).

摘　　要：For a water supply system with long-distance diversion pipelines, in addition to the water hammer problems that occur beyond pumps, the safety of the water diversion pipeline in front of pumps also deserves attention. In this study, a water hammer protection scheme combined with an overflow surge tank and a regulating valve was developed. A mathematical model of the overflow surge tank was developed, and an analytical formula for the height of the overflow surge tank was derived. Furthermore, a practical water supply project was used to evaluate the feasibility of the combined protection scheme and analyze the sensitivity of valve regulation rules. The results showed that the combined protection scheme effectively reduced the height of the surge tank, lessened the difficulties related to construction, and reduced the necessary financial investment for the project. The two-stage closing rule articulated as fast first and then slow could minimize the overflow volume of the surge tank when the power failure occurred, while the two-stage opening rule articulated as slow first and then fast could be more conducive to the safety of the water supply system when the pump started up.

关 键 词：Long-distance diversion pipeline Water supply Water hammer Overflow surge tank Regulating valve 

分 类 号：TV213.4[水利工程—水文学及水资源]