| 引用本文: | 李雨晴,张 健,俞晓东,等.水力边界不确定性对长距离输水系统关阀水锤的影响[J].灌溉排水学报,2026,45(4):54-62. |
| LI Yuqing,ZHANG Jian,YU Xiaodong,et al.水力边界不确定性对长距离输水系统关阀水锤的影响[J].灌溉排水学报,2026,45(4):54-62. |
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| 摘要: |
| 【目的】探究长距离重力流输水系统过渡过程计算中水力边界不确定性对关阀水锤的影响。【方法】采用理论分析和数值模拟相结合的方法，开展了长距离输水系统关阀水锤方面的研究。【结果】①调流阀曲线的不确定性对关阀水锤影响较大，最大影响值为3.744，而管道糙率、管道长度和水锤波速的不确定性对关阀水锤影响较小，最大影响值为0.799。②为缓解调流阀曲线不确定性对关阀水锤的不利影响，提出了关闭调流阀前的蝶阀和用双调流阀并联代替原调流阀运行的2种工程措施。【结论】关闭调流阀前的蝶阀和用双调流阀并联代替原调流阀均可使最大水锤满足承压标准，从而避免爆管事故的发生。 |
| 关键词: 输水系统；调流阀；水锤；参数不确定性；关阀方案 |
| DOI：10.13522/j.cnki.ggps.2025204 |
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| Influence of hydraulic parameter uncertainty on valve-closure water hammer in gravity-driven long-distance water delivery systems |
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LI Yuqing, ZHANG Jian, YU Xiaodong, CHEN Sheng, QIU Weixin
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College of Water Conservancy & Hydropower Engineering, Hohai University, Nanjing 210098, China
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| Abstract: |
| 【Objective】Long-distance gravity-driven water delivery systems are widely used in water transfer and irrigation projects. However, in transient flow calculations, key physical parameters, such as valve characteristics, pipeline roughness, pipeline length, and wave velocity, are often subject to uncertainties, which affect the accuracy of water hammer analysis and the safe operation of pipeline systems. This paper investigates the influence of parameter uncertainty on valve-closure water hammer in such water delivery systems.【Method】The study was based on a combination of theoretical analysis and numerical simulations, through which we systematically evaluated the effects of uncertainties in regulating valve characteristics, pipeline roughness, pipeline length, and wave velocity on water hammer pressure.【Result】①The uncertainty of the parameters characterizing the regulating valve characteristic curve had a significant impact on valve-closure water hammer, with a maximum influence value of up to 3.744. In contrast, the uncertainties of the parameters characterizing pipeline roughness, pipeline length, and wave velocity had relatively minor effects, with their maximum influence values being less than 0.799. ②To mitigate the adverse impact caused by uncertainties in the parameters characterizing the regulating valve curve, two engineering measures were proposed: one is to close the butterfly valve before the regulating valve, and the other is to replace the original regulating valve with two regulating valves operating in parallel.【Conclusion】Simulation results indicate that both proposed engineering measures can effectively reduce the maximum water hammer pressure to within the allowable pressure-bearing limit of the pipeline system, thereby reducing the risk of pipe burst accidents and improving the operational safety of long-distance gravity-driven water delivery systems. |
| Key words: water delivery system; regulating valve; water hammer; parameter uncertainty; valve closure scheme |
