收缩射流与跌坎消力池复合消能工参数优化研究  

Study on the Optimal Parameters of the Composite Energy Dissipation of the Contraction Jet and Step-down Floor Stilling Basin

作　　者：李一川 王立杰 邓淯宸[2] 唐秋明 蒋雁森 

机构地区：[1]水能资源利用关键技术湖南省重点实验室,湖南长沙410014 [2]西安理工大学水利水电学院,陕西西安710048

出　　处：《杨凌职业技术学院学报》2017年第4期5-9,共5页Journal of Yangling Vocational & Technical College

基　　金：水能资源利用关键技术湖南省重点实验室开放研究基金资助项目(PKLHD201301)

摘　　要：基于某工程泄洪洞消力池由大单宽流量、低傅汝德数造成的不稳定震荡水跃问题,对消力池进行了几种局部体型优化,最终提出了在消力池前设置收缩墩的收缩扩散与底流复合消能消力池方案。试验结果表明,该方案能较好地解决消力池内不稳定水跃导致的间歇性水流震荡和水面大幅波动等问题,同时消力池内消能率也显著增加,下游冲刷大为减轻。为类似工程的消能问题提供了一种新思路。Based on unstable oscillating hydraulic jump problem in a project stilling basin resulted from large discharge per unit width and low Froude number,this paper carried out several local body type optimization for stilling basin,and finally came up with a composite energy dissipation scheme combined with contraction diffusion and energy dissipation underflow by setting a shrinkage pier in front of the stilling basin.The test results show that this scheme can solve the problems such as the intermittent water turbulence caused by unstable water jump and the large fluctuation of water surface,at the same time,the energy dissipation rate also increased significantly,and the downstream erosion was greatly reduced.It provides a new idea for energy dissipation of similar project.

关 键 词：大单宽流量 低傅汝德数 震荡水跃 收缩射流 跌坎消力池 

分 类 号：TV653.1[水利工程—水利水电工程]