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继文 ( 1 )提出数值方案后 ,本文完成了计算程序编制 ,并对典型环状给水管网总管及网间管段阀门关闭过程产生的水力瞬变进行了计算分析。结果表明 :阀前阀后管段中的关闭水锤较管网其它管段要大得多 ;按本文计算所用的阀门特性 ,水锤压力急剧上升时的阀门开度低于 2 % ,控制好此后的关闭过程对降低水锤有利 ;延长给水总管阀门关闭时间有利于降低关闭瞬间水锤。本文方法具有良好的收敛性 ,可用于实际进行工程问题分析。
Following the text (1) proposed numerical program, this article has completed the preparation of the calculation program, and the typical ring shaped water supply pipe network and network section of the valve closing process of hydraulic transients were calculated and analyzed. The results show that the closing water hammer in the pipe section of the valve before the valve is much larger than other pipe sections in the pipe network. According to the valve characteristics calculated in this paper, the valve opening when the water hammer pressure rises sharply is less than 2% Close the process to reduce the water hammer beneficial; extend the water main valve closing time is conducive to reducing the moment of closure water hammer. The proposed method has good convergence and can be used to analyze engineering problems in practice.