长距离有压输水管道系统水锤研究进展

Research progress of water hammer in long distance pressurized water pipeline system

跨流域、跨区域的长距离有压输水工程建设是缓解社会水资源供需矛盾的有效方法。为解决长距离有压输水管道系统运行过程中产生的水锤危害,综述了目前长距离有压输水管道系统滞气水锤、气液两相流、滞气爆管在理论分析、数值模拟、物理模型试验等主要方面的研究。在滞气水锤方面,认为对由小体积气泡引起的滞气水锤研究还不够充分;在气液两相流方面,基于气泡随机分布理论开展的滞气水锤研究较少;在滞气爆管方面,以随机分布理论为基础的滞气爆管风险评估和滞气水锤计算方法尚未建立。因此,综述长距离有压输水管道系统水锤研究具有一定的工程实践意义。

The construction of long-distance pressurized water transmission projects across basins and regions is an effective method to alleviate the outstanding contradiction between supply and demand of water resources.In order to solve the water hammer hazard in the operation of long distance pressurized water transmission pipeline system,the main research on the theoretical analysis,numerical simulation and physical model test of the gas hammer,gas liquid two-phase flow and gas explosion in the long distance pressurized water transmission pipeline system is reviewed.In the aspect of air-holding water hammer,the research of air-holding water hammer caused by small volume bubbles is not enough.In the aspect of gas-liquid two-phase flow,there are few researches on water hammer based on bubble random distribution theory.In the aspect of stagnant gas explosion pipe risk assessment and stagnant gas water hammer calculation methods based on random distribution theory have not been established.Therefore,it is of practical significance to summarize the research of water hammer in long distance pressurized water pipeline system.