[关键词]
[摘要]
对长距离高落差重力流供水工程中阀门动作规律进行了研究, 分析了关阀的水锤特性, 运用特征线法推导了 在已知阀门关闭规律时管道首相水锤压力的解析公式以及在已知管道控制压力时阀门最快直线关闭规律的解析公 式, 并结合数值计算对公式的正确性进行检验。结果表明: 推导出的首相水锤压力解析公式和水锤直线关阀规律解 析公式计算均与数值计算结果吻合较好, 精度较高, 可为高落差重力流供水工程的管道设计及运行调度提供参考。
[Key word]
[Abstract]
Wat er hammer of fir st phase usually occur s in the lo ng2distance and high2head water2supply system. Thus, once the downstream v alve is ur gently closed in case of an accident in a pro ject, a rat ional closure r ule is needed to ensur e the safet y o f the water2supply sy stem. Based on the long2distance and high2fall g rav ity flow w ater2supply pr oject, the fo rmula of water hammer at the end of first phase and the formula fo r linear v alv e clo sure wer e proposed based on the metho d o f characterist ic (MOC) when v alv e clo sur e law or w ater hammer pr essure w ere know n. The two fo rmulas had been tested by numer ical calcula2 t ion. It was observ ed that the results of both fo rmulas fit t he r esults o f numer ical calculat ion ver y w ell. Taken tog et her , w e be2 liev e t hat t he conclusion of this paper could pr ovide a refer ence fo r pipeline desig n, operatio n and dispatching of long2distance and hig h2dro p g r av ity flow w ater2supply pro ject.
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[基金项目]
国家自然科学基金( 51379064)