水力发电2024，Vol.50Issue(6)：55-60,78,7.
超长龙落尾式溢洪洞水力特性研究
Study on the Hydraulic Characteristics of Super-long Longitudinal End Sill Spillway Tunnel
摘要
Abstract
Taking the No.2 longitudinal end sill spillway tunnel in a large-scale water conservancy project as the research object,the k-ε double equation turbulent flow model is adopted,combined with the results of a 1∶50 normal hydraulic model,to analyze the hydraulic characteristics of the overflow tunnel under characteristic water levels,in order to explore the vertical velocity distribution along the way and the formation of water wings in the overflow tunnel.The results indicate that,(a)there is a good agreement between the numerical simulation and the model test results,which verifies the reliability and accuracy of numerical simulation;(b)the arrangement of the longitudinal end sill spillway tunnel reduces the risk of high-velocity flow damage,and forms a stable aeration cavity in the aeration bucket area,indicating that the arrangement method is reasonable;(c)the central area of the vertical velocity distribution in the ultra long spillway tunnel fits well with the logarithmic distribution,while the area near the bottom plate and water surface is more in line with the parabolic distribution,and with the increase of flow path,the uneven distribution of cross-sectional flow velocity in the ultra long spillway tunnel increases,and the high-velocity flow zone gradually concentrates towards the middle and upper parts near the water surface;and(d)at the changing slope,the vertical flow velocity distribution in front of the aerator is uneven,and the angle between the water tongue behind the aerator and the bottom plate of the tail section is larger,resulting in strong water wings on both sides of the side walls,so it is recommended to take measures to eliminate these adverse effects.关键词
龙落尾式溢洪洞/数值仿真/水力特性/流速分布/水翅Key words
longitudinal end sill spillway tunnel/numerical simulation/hydraulic characteristics/velocity distribution/water wing分类
建筑与水利引用本文复制引用
王欣虎,罗永钦,冯业林,黄海龙,罗文俊..超长龙落尾式溢洪洞水力特性研究[J].水力发电,2024,50(6):55-60,78,7.基金项目
云南省"兴滇英才支持计划"青年人才项目(KKRD-202204020) （KKRD-202204020）
华能集团科技项目(HNKJ21-HF240) （HNKJ21-HF240）
云南省基础研究计划项目面上项目(202301AT070437) （202301AT070437）
云南省基础研究计划项目青年项目(202101AU070156) （202101AU070156）
