球阀关阀过程对水锤效应的影响分析
Analysis of Influence of Closing Process of Ball Valve on Water Hammer Effect

本文为了对球阀不同关阀过程下水锤效应产生的影响进行分析，采用fluent软件滑移网格和udf技术模拟球阀关闭时的转动过程，对球阀关阀过程中的流场变化以及水锤压力变化进行了研究分析。研究结果表明：随着阀门的关闭，球阀流速先上升后下降，当球阀流速达到最大值时，流体介质对阀芯产生最大冲击，球阀水锤压力达到最大值。球阀水锤压力的最大值随着关阀时间的增加逐渐减小，且在相同关阀时间下，采用匀加速关阀和匀减速关阀会比匀速关阀产生更大的水锤压力。
In this paper, in order to analyze the influence of water hammer effect in different closing processes of ball valve, the sliding grid of fluent software and udf technology are used to simulate the rotation process of ball valve when it is closed, and the changes of flow field and water hammer pressure during the closing process of ball valve are studied and analyzed. The results show that with the closing of the valve, the flow rate of the ball valve increases first and then decreases. When the flow rate of the ball valve reaches the maximum value, the fluid medium has the maximum impact on the valve core, and the water hammer pressure of the ball valve reaches the maximum value. The maximum water hammer pressure of ball valve gradually decreases with the increase of valve closing time, and under the same valve closing time, uniform acceleration and uniform deceleration will produce greater water hammer pressure than uniform speed.