长距离重力流输水系统水锤模拟及其防护研究  

Research on Water Hammer Simulation and Protection for Long Distance Gravity Flow Water Conveyance System

作　　者：张景望 吴建华[1] 高洁[1] 郭伟奇 李娜 褚志超 ZHANG Jing-wang;WU Jian-hua;GAO Jie;GUO Wei-qi;LI Na;CHU Zhi-chao(College of Water Conservancy Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学水利科学与工程学院,山西太原030024

出　　处：《水电能源科学》2019年第5期57-60,共4页Water Resources and Power

基　　金：2016年山西省国际合作项目(201603D421011);2017年山西省研究生教育创新项目(2017SY015);2017年山西省水利厅重大水利技术推广与研究项目(SXSZBYHGC-QT-QT-012);2018年山西省水利厅重大水利技术推广与研究项目

摘　　要：针对长距离重力流输水系统中的水锤防护问题,以山西省乡宁县县城重力流供水工程为背景,依据水锤计算的基本原理,建立水锤计算模型、末端调流调压阀边界条件及超压泄压阀边界条件,通过数值模拟计算,提出了重力流输水条件下的水锤防护新思路。根据输水管线的稳态运行情况,首先确定了输水管线在末端调流调压阀不同线性关闭方式下的水锤压力变化规律,得出阀门最优关闭时间为1 200s;其次,经优化计算,使用24个空气阀与2台超压泄压阀联合防护,可以确保工程安全运行。研究成果可为重力流工程设计提供参考。Aiming at the problem of water hammer protection in long distance gravity flow water conveyance system, based on the gravity flow water supply project in Xiangning County, Shanxi Province, according to the basic principle of water hammer calculation, the water hammer calculation model, the boundary condition of the end regulating pressure regulating valve and the boundary condition of the overpressure pressure relief valve are set up. Under the gravity flow water transport conditions, new ideas of water hammer protection under is put forward through numerical simulation calculation. According to the steady state operation of water pipeline, the change law of water hammer pressure in the different linear closing mode of the terminal regulating pressure valve is first determined, and the optimal closing time of the valve is 1 200 s. Secondly, through optimization calculation, combined 24 air valves with 2 overpressure relief valves are used to ensure the safety of the project. The research results can provide reference for gravity flow engineering design.

关 键 词：重力流输水 水锤防护 调流调压阀 超压泄压阀 

分 类 号：TV674[水利工程—水利水电工程]