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中文摘要：
为控制长距离有压输水管路的水锤压力，运用特征线方法，结合某实际工程，对长距离有压输水管道系统的事故停泵过程进行了计算，得到缓闭蝶阀不同关闭时间和关闭方式下各管段内沿程的最大和最小水锤压力以及相对空化体积数．计算结果表明，不同缓闭蝶阀关闭方式下，管内展现出不同的水锤特性，直接体现在管道的相对空化体积及空化区域上．通过对比分析，提出相对最优的缓闭蝶阀关闭时间和关闭方式．
英文摘要：
To control the pressure of water hammer for a long water pipe supply system, calculations were carried out for the transient process caused by accidental pump-stop using the method of characteristic contours. The pressure of water hammer and relative cavitation volume in every pipe were gained. The numerical results show that the pressure of water hammer are different at different closed modes of slow closing check valve, which also reflects from the relative cavitation volume and regions of cavitation. Further, the finest close mode is recommended, which would be helpful to analyze similar projects in future.
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