双泵给水系统水锤敏感度分析

建立双泵并联给水系统,对本给水系统水锤过程进行了数值模拟以及定量分析,重点进行双泵给水系统水锤作用敏感度分析。结果表明:初始流量对水锤作用效果影响明显,随着初始流量增大,输水管道后压差波动明显增强;离心泵转动惯量增加,停泵水锤作用效果将减弱;输水流量不变情况下,输水管道管径增加将缓解水锤压力;另外,改变调节阀关闭方式也将对水锤效果产生明显影响。

An Analysis of Water Hammer Sensitivity in Double-pump Water Supply Systems

In this paper,based on the model of a specific parallel two-pump water supply system,the numerical simulation and quantitative analysis of water hammer of this water supply system are carried out,with emphasis on sensitivity analysis of water hammer.The research results show that the effect of flow on water hammers is significant,with the initial flow rate increasing,fluctuations of pressure increases significantly.As the moment of inertia of centrifugal increases,the water hammer effect will be weakened.In the case of constant water supply,the increase of diameter of the pipeline will ease water hammer pressure.In addition,the ways of the control valve closes will have a significant impact on the water hammer effect.