摘要
为避免挑流阶梯溢洪道挑流发生半淹没射流,导致前置阶梯段压力分布异常、水翅现象严重以及结构振动等问题,采用物理模型试验结合理论分析,设计了3种试验模型,研究设置通风井、延长进口水平段对挑流段水流流态和水力特性的影响。研究结果表明:设置通风井与延长进口水平段能显著改善挑流流态,有效减弱水翅现象,顺利消除负压等不利水力条件;得出了挑流阶梯溢洪道的最大运行流量和掺气池最小长度的计算表达式,可为挑流阶梯溢洪道的结构设计和工程运行提供参考。
To prevent the semi-submerged jet in ski-jump stepped spillways,which leads to abnormal pressure distributions,severe water wing phenomena and structural vibrations in the upstream step section,a combination of physical model tests and theoretical analysis was used,and three types of test models were designed to study the influence of installing ventilation shafts and extending the inlet horizontal section on the flow pattern and hydraulic characteristics of the ski-jump section.The results show that installing ventilation shafts and extending the inlet horizontal section can significantly improve the ski-jump flow pattern,effectively mitigate the water wing phenomenon,and successfully eliminate adverse hydraulic conditions such as negative pressure.The maximum operating discharge for the ski-jump stepped spillway and the minimum length of the aeration basin were determined,providing a reference for the structural design and operation of ski-jump stepped spillways.
作者
钱尚拓
张浩达
刘光远
吴建华
冯建刚
何强
QIAN Shangtuo;ZHANG Haoda;LIU Guangyuan;WUJianhua;FENG Jiangang;HE Qiang(College of Water Conservancy and Civil Engineering,Xizang Agriculture and Animal Husbandry University,Linzhi 860000,China;Research Center of Civil,Hydraulic and Power Engineering of Xizang,Linzhi 860000,China;College of Agricultural Science and Engineering,Hohai University,Nanjing 210098,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China)
出处
《水利水电科技进展》
北大核心
2025年第6期19-25,共7页
Advances in Science and Technology of Water Resources
基金
西藏农牧学院2023年柔性引进人才项目(755550014)
林芝市校地合作项目(XDHZ-2025-06)。
关键词
挑流阶梯溢洪道
挑流水舌
掺气池
流态
水力特性
ski-jump stepped spillway
ski-jump jet
aeration basin
flow pattern
hydraulic characteristics
