长距离多支线有压输水系统起动水锤防护  

Start-up water hammer protection for long-distance multi-branch pressurized water conveyance systems

作　　者：蔡付林[1] 樊子凯 周建旭[1] 周骏 CAI Fulin;FAN Zikai;ZHOU Jianxu;ZHOU Jun(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学水利水电学院,江苏南京210098

出　　处：《水利水电科技进展》2024年第4期1-6,共6页Advances in Science and Technology of Water Resources

基　　金：国家自然科学基金面上项目(52379087)。

摘　　要：为研究同时包含重力流输水管线与泵站加压提水管线的长距离多支线有压输水系统开启运行时的水锤问题,基于瞬变流分析的特征线法建立了输水系统过渡过程计算的数学模型,结合实际工程计算了输水系统开启运行时调节阀与水泵及其出口阀不同的开启时间与控制策略对水锤的影响,并在此基础上提出了空气阀联合阀门开启的水锤防护方案。结果表明:采取提水泵站滞后调节阀开启运行,且各提水泵站相继开启的策略可有效改善输水系统沿线的内水压力分布;采用空气阀联合阀门开启的水锤防护方案可在不影响输水系统反应速度的情况下以较小尺寸的空气阀达到较好的水锤防护效果。In order to study the water hammer problem of a long-distance multi-branch pressurized water conveyance system composed of gravity flow pipelines and pump pressurized pipelines during startup,a mathematical model for calculating the transient process of the water conveyance system was established based on the method of characteristics.Taking an actual project as an example,the impact of different opening time and control strategies of the regulating valve and the pump and its outlet valve on water hammer was calculated during the startup period of the water conveyance system.A water hammer protection scheme using air valves in combination with valve opening was proposed.The results show that the internal water pressure along the water conveyance system can be effectively improved by adopting the strategy that the opening of pump stations lags behind the start of regulating valves and each pump station is opened successively.The water hammer protection scheme using air valves in combination with valve opening can achieve better water hammer protection effect with a smaller size of air valves without affecting the response speed of the water conveyance system.

关 键 词：有压输水系统 水锤 瞬变流 数值模拟 

分 类 号：TV134.1[水利工程—水力学及河流动力学]