窄河谷大夹角挑流消能工体型优化研究  

Experimental Study on Optimization for Ski-jump Energy Dissipationwith Large-angle in Narrow Valley

作　　者：陈刚[1] 张陆陈[2] 俞雷 朱丽至 CHEN Gang;ZHANG Lu-chen;YU Lei;ZHU Li-zhi(Xinjiang Water Conservancy and Hydropower Survey Design Institute Co.,LTD.,Urumqi 830000,China;Hydraulic Engineering Department,Nanjing Hydraulic Research Institute,Nanjing 210029,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]新疆水利水电勘测设计研究院有限责任公司,新疆乌鲁木齐830000 [2]南京水利科学研究院水工水力学研究所,江苏南京210029 [3]河海大学水利水电学院,江苏南京210098

出　　处：《水电能源科学》2024年第4期76-79,102,共5页Water Resources and Power

基　　金：国家重点研发计划(2021YFC3090105);中央级公益性科研院所基本科研业务费专项资金项目(Y123008)。

摘　　要：针对窄河谷大夹角条件下挑流消能易出现冲击两岸、冲坑过深的问题,采用水工整体模型试验方法对具有代表性的某水利枢纽深孔放水冲沙洞挑流鼻坎体型开展优化研究,并对比分析了水舌形态和下游河道冲刷特性。结果表明,不对称收缩的异型窄缝式消能工可使水流在狭窄河道归槽,水舌纵向拉伸效果较好,大幅减轻了河床冲刷;提出了收缩比、收缩角差、斜切面积比等特征参数适宜的挑流消能工体型,可供窄河谷大夹角条件下挑流消能设计参考。Under the condition of narrow valley with large included angle,the ski-jump energy dissipation is prone to impact on both sides of the river and too deep scour pit.Thus,this study adopts a hydraulic overall model test to optimize the flip bucket shape of ski-jump energy dissipation in a representative deep hole water discharge and sand flushing tunnel of a water conservancy hub,and compares the shape of the water tongue and the scouring characteristics of the downstream river.The results show that the asymmetric contraction of the shaped narrow slit energy dissipater can make the water flow in the narrow river return to the trough,and the tongue of the water longitudinal stretching effect is better,which significantly reduces the riverbed scour.The suitable ski-jump energy dissipation with characteristic parameters of contraction rate,contraction angle difference and oblique cross-sectional area ratio are proposed,which can be used as a reference for the design of ski-jump energy dissipation with large-angle in narrow valley.

关 键 词：窄河谷 大夹角泄洪消能 窄缝消能工 水工模型试验 体型优化 

分 类 号：TV135.23[水利工程—水力学及河流动力学]