| 汪怡然,俞晓东,石林,张健.输水管道含沙水锤模型及特性研究[J].水利学报,2022,53(8):984-990 |
| 输水管道含沙水锤模型及特性研究 |
| Models and characteristics of sand-contained water hammer in water transfer conduit |
| 投稿时间：2022-03-12 |
| DOI：10.13243/j.cnki.slxb.20220169 |
| 中文关键词: 输水管道 非均质流 含沙水锤 特征线法 数值计算 |
| 英文关键词: water transfer conduit heterogeneous flow sand-contained water hammer method of characteristics numerical simulation |
| 基金项目:国家自然科学基金项目（52179062，51879087） |
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| 中文摘要: |
| 水锤现象的准确描述对于长距离供水工程安全稳定运行有着至关重要的影响，但传统的水锤模型缺乏对于输水管道含沙水锤的深入探讨与分析。本文基于费祥俊阻力模型定义了管路当量摩阻，借鉴韩文亮浆体水锤波速公式推导了非均质流含沙水锤特征线方程，采用特征线法计算得到了不同泥沙颗粒参数下RPV系统的关阀水锤压力，并与清水水锤计算压力对比。结果表明：清水水锤数值计算瞬态压力与实验数据较为吻合；含沙水锤压力增量与含沙量呈正相关而与颗粒直径无关，含沙量100 kg/m3时最大水锤压力为77.91 m，较清水计算结果高出7.71%；由当量摩阻换算得到的管路糙率与含沙量和颗粒直径呈正相关，与初始流速呈负相关。相关研究成果为高含沙流域长距离供水工程安全运行与水锤防护提供了参考。 |
| 英文摘要: |
| The accurate description of water hammer phenomenon has a vital impact on the safe and stable operation of long-distance water supply projects.However,the traditional mathematical model is not enough to discuss and analyze the mechanism and law of sand-contained water hammer in pipelines.In this paper,the equivalent friction of pipeline is defined based on Fei Xiangjun's resistance model.Referring to Han Wenliang's slurry water hammer wave velocity formula,the characteristics equation of sediment laden water hammer is deduced.The valve closing water hammer pressure of RPV system under different sediment particle parameters is calculated by method of characteristics,which is compared with that of clean water.The results show that the clean water hammer transient pressure calculated by numerical simulation is in good agreement with the experimental data.The increment of sand-contained water hammer pressure is positively correlated with sediment concentration but has nothing to do with particle diameter,and the maximum pressure of 100 kg/m3 is 77.91 m,which is 7.71% higher than that of pure water test data.The pipeline roughness converted from equivalent friction is positively correlated with sediment concentration and particle diameter,and negatively correlated with initial flow velocity.The research results provide a reference for the safe operation and water hammer protection of long-distance water supply projects in high-sand watersheds. |
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