| 长距离高落差重力流供水工程的关阀水锤 |
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| 作者姓名： | 罗 浩 张 健 蒋梦露 俞晓东 黎东洲 |
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| 作者单位： | 河海大学 水利水电学院,南京,210098 |
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| 基金项目： | 国家自然科学基金( 51379064) |
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| 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。
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| 关 键 词： | 重力流 高落差输水 流阻系数 首相水锤 关阀规律 特征线法 |
Water2hammer in the long2distance and high2drop water2supply project of gravity flow |
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| Authors: | LUO Hao ZH ANG Jian JIANG Menglu YU Xiaodong LI Dongzhou |
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| Affiliation: | ( Colleg e o f Water Cons er v ancy and H y dr op ow er E ngineer ing , H ohai Univer sity , N anj ing, 210098, China) |
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| 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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| Keywords: | g rav ity flow hig h2fa ll water convey ance sy stem coefficient o f flow resistance first phase water hammer valve clo2
sure law MOC |
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