长距离高落差重力流供水工程的关阀水锤  

Water-hammer in the long-distance and high-drop water-supply project of gravity flow

作　　者：罗浩[1] 张健[1] 蒋梦露 俞晓东[1] 黎东洲 

机构地区：[1]河海大学水利水电学院,南京210098

出　　处：《南水北调与水利科技》2016年第1期131-135,共5页South-to-North Water Transfers and Water Science & Technology

基　　金：国家自然科学基金(51379064)~~

摘　　要：对长距离高落差重力流供水工程中阀门动作规律进行了研究,分析了关阀的水锤特性,运用特征线法推导了在已知阀门关闭规律时管道首相水锤压力的解析公式以及在已知管道控制压力时阀门最快直线关闭规律的解析公式,并结合数值计算对公式的正确性进行检验。结果表明:推导出的首相水锤压力解析公式和水锤直线关阀规律解析公式计算均与数值计算结果吻合较好,精度较高,可为高落差重力流供水工程的管道设计及运行调度提供参考。Water hammer of first phase usually occurs in the long-distance and high-head water-supply system.Thus,once the downstream valve is urgently closed in case of an accident in a project,a rational closure rule is needed to ensure the safety of the water-supply system.Based on the long-distance and high-fall gravity flow water-supply project,the formula of water hammer at the end of first phase and the formula for linear valve closure were proposed based on the method of characteristic（MOC）when valve closure law or water hammer pressure were known.The two formulas had been tested by numerical calculation.It was observed that the results of both formulas fit the results of numerical calculation very well.Taken together,we believe that the conclusion of this paper could provide a reference for pipeline design,operation and dispatching of long-distance and high-drop gravity flow water-supply project.

关 键 词：重力流 高落差输水 流阻系数 首相水锤 关阀规律 特征线法 

分 类 号：TV134[水利工程—水力学及河流动力学]