长距离输水系统串联多阻抗调压室的水锤防护效果

Water hammer protection effect of series throttled surge chambers in long-distance water conveyance system

结合某长距离、大流量输水工程,系统分析了单阻抗调压室和串联多阻抗调压室两种布置情况下阻抗孔径对水锤防护效果和最低涌浪的影响。结果表明:单阻抗调压室防护方案下,通过改变调压室阻抗孔径可降低水锤压力,提升调压室最低涌浪,有效减小调压室占地面积;相比于单阻抗调压室防护方案,串联多阻抗调压室的防护效果更佳,可提高管线最小压力和最低涌浪,显著减小调压室总面积,且主、辅调压室均存在最优阻抗孔径。

A long-distance and large-flow water conveyance project is selected as a study case,and effects of the diameter of impedance hole on the water hammer protection and the minimum surge are systematically analyzed under two layouts,which are single throttled surge chamber and series throttled surge chambers.The results show that for the single throttled surge chamber scheme,through changing the diameter of the impedance hole of the surge chamber,the water hammer pressure can be reduced,the minimum surge in the surge chamber can be increased,and the surge chamber area can be effectively reduced.Compared with the single surge chamber scheme,the effect of the series throttled surge chambers is better,for it can increase the minimum pressure along the pipeline and the minimum surge,significantly reduce the total area of the surge chambers,and all the surge chambers have optimal impedance apertures.