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多股水平淹没射流水力特性的影响因素研究
引用本文:李艳玲,华国春,张建民,杨永全.多股水平淹没射流水力特性的影响因素研究[J].水科学进展,2006,17(6):761-766.
作者姓名:李艳玲  华国春  张建民  杨永全
作者单位:四川大学水利水电学院, 四川, 成都, 610065
基金项目:国家自然科学基金;四川大学校科研和教改项目
摘    要:采用数值模拟和模型试验相结合的方法,分析了水股分层、坎高、出口体型和跌坎形式等因素对多股水平淹没射流的流态稳定性和水力特性的影响。研究表明,多股多层水平淹没射流较单层多股水平淹没射流流态稳定性好、临底流速低、消能率高,是一种高效的新型消能方式。结合试验结果,提出中孔泄槽以等宽或微收缩为宜、表中孔最优坎高差应大于中孔水流的主流水深、跌坎形式的选择应结合具体工程特点等建议。

关 键 词:水力学    水力特性    单层多股    多股多层    水平淹没射流
文章编号:1001-6791(2006)06-0761-06
收稿时间:2005-07-18
修稿时间:2005-12-26

Factors affecting the hydraulic characteristics of horizontal submerged jets
LI Yan-ling,HUA Guo-chun,ZHANG Jian-min,YANG Yong-quan.Factors affecting the hydraulic characteristics of horizontal submerged jets[J].Advances in Water Science,2006,17(6):761-766.
Authors:LI Yan-ling  HUA Guo-chun  ZHANG Jian-min  YANG Yong-quan
Institution:College of Water Resource and Hydropower, Sichuan University, Chengdu 610065, China
Abstract:Based on the 3-D numerical simulation and the model test,many factors affecting the flow pattern stability and the hydraulic characteristics of the horizontal Submerged Jets are studied.The results show that multi-lever and multi-strand horizontal submerged jets are a new energy dissipation type and have better stability of flow patter,lower velocity in the slab and higher dissipated energy rate than the single-lever and the multi-strand horizontal submerged jets.Connecting to the model test,some suggestions,important for design,are put foward,for example,the chute width of intermediate outlet should be constant;the optimum height difference of drop between intermediate outlet and surface outlet should be larger than the water depth at intermediate outlet;and the type of drop should be changed with the characteristics of certain project.
Keywords:hydraulics  hydraulic characteristics  single-lever and multi-strand  multi-lever and multi-strand  horizontal submerged jets
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