中文摘要：

采用Fluent中的滑移网格技术模拟了球阀的转动过程，对管道中阀门突然关闭引起的水击压强进行了数值计算。计算采用标准k-ε模型并考虑了水的压缩性。通过UDF定义球阀的转动速度，分析了关阀时间和关阀方式对水击压强的影响。结果表明阀门匀速关闭时增大关阀时间对减小水击压强的作用效果在0．3 s之前较为明显；阀门关闭时间一定时，减速关阀方式能有效降低最大水击压强。

英文摘要：

The rotation process of ball valve was simulated by using the sliding grid technology of Fluent software, and the water hammer pressure caused by the suddenly closed of the ball valve in the pipeline was calculated. In the calcula-tion, the standard turbulent model was used with considering the compressibility of water. The rotational speed of ball valve was controlled by UDF. The influence of valve’ s closure way and time on water hammer pressure were analyzed. Results show that when the valve is closed at a constant speed, the increase of closing time can reduce the water hammer pressure, and the effect is evident before 0. 3 s;when the valve closing time is fixed, the deceleration way can effective-ly reduce the water hammer pressure.