根据气囊式空气罐的工作原理, 推导了水泵掉电情况下气囊式空气罐的涌浪周期及压力波动理论公式, 并与 常规空气罐进行了对比, 分析了不同参数对气囊式空气罐水锤防护性能的影响, 给出了气囊式空气罐过渡过程数学 模型。结合某长距离输水工程实例, 利用过渡过程数值仿真, 对气囊式空气罐与常规空气罐的水锤防护效果进行了 对比。结果显示气囊式空气罐能够有效缓解长距离输水工程中的停泵水锤, 且其防护性能优于常规空气罐。

Acco rding to the w o rking principle of pneumatic tank, the sur ge cy cle and pr essure fluctuat ion fo rmulae o f the pneu2 matic t ank w ere deduced under the circumstance of pow er2o ff pumping. Compa red w ith the or dinar y air tank, the effects of dif2 fer ent par amet ers o n the perfo rmance o f w ater hammer pr otectio n for pneumatic tank w ere analyzed, and the mathematical mod2 el of the pneumat ic tank in tr ansit ion per iod w as developed. Combined w ith the ex ample o f a lo ng distance w ater supply pro ject, the effects of w ater hammer pr otection bet ween pneumatic tank and o rdinary air tank w er e compar ed using the numer ical simu2 latio n o f t ransition per iod. The r esult s showed t hat pneumatic tank can effect ively elim inat e pump2stopping water hammer in the long distance water supply pr oject and has better pro tect ive features than t he o rdinary air tank.

国家自然科学基金项目( 51379064)