水力发电2024，Vol.50Issue(5)：70-75,87,7.
高拱坝表中孔窄缝式挑坎泄洪雾化特性分析
Analysis of Flood Discharge Atomization Characteristics of Slit-type Bucket at Upper and Deep Orifices of High Arch Dam
摘要
Abstract
The flood discharge atomization characteristics of upper and deep orifices with slit-type bucket layout of the arch dam in Guxue Hydropower Station are analyzed.Based on the results of physical model experiments,the hydraulic factors of flood discharge atomization of the dam's orifices are determined under different frequency flood conditions.The contour distributions of flood discharge wind velocity and atomization rainfall intensity are obtained by considering the factors such as water jet impinging morphology,complex valley terrain,and meteorological conditions.The research shows that,the slit-type bucket of the upper and deep orifices causes the flood discharge jet to be longitudinally stretched,and the splashing on both sides of the jet is covered by the front water body,at the same time,when the upper and deep orifices are combined for flood discharge,different water jets on the inner and outer sides can also cover each other.Due to its ability to weaken the atomization sources on both sides of the jets,the narrow slit-type bucket can effectively reduce the climbing range of atomized fog and rain on both banks,while ensuring energy dissipation safety.Under various flood discharge operations of the dam orifices,the longitudinal range of atomized rainfall area is between 80-700 m downstream of the dam,and the climbing height of the atomized rainfall on both banks is only 120-140 m.The rainfall intensity at the tail water outlet of the downstream power plant on the right bank is 0-20 mm/h,which belongs to the category of natural rainfall.关键词
泄洪雾化/降雨强度/数学模型/高拱坝/窄缝挑坎/古学水电站Key words
flood discharge atomization/rainfall intensity/mathematical model/high arch dam/slit-type bucket/Guxue Hydropower Station分类
建筑与水利引用本文复制引用
刘要来,柳海涛,陈鸿杰,孙双科,宋泽明..高拱坝表中孔窄缝式挑坎泄洪雾化特性分析[J].水力发电,2024,50(5):70-75,87,7.基金项目
中国华能集团有限公司科技项目(HNKJ22-H109) （HNKJ22-H109）
