控导浅层急流的潜没式三角翼体特性研究  

Analyze of the properties of the submerged triangle wing for adjusting shallow supercritical flow

作　　者：孙东坡[1] 罗秋实[2] 严军[1] 王二平[1] 宋永军[1] 

机构地区：[1]华北水利水电学院,河南郑州450011 [2]武汉大学水利水电学院,湖北武汉430072

出　　处：《水科学进展》2007年第4期509-515,共7页Advances in Water Science

基　　金：国家自然科学基金资助项目(50509008);华北水利水电学院青年基金资助项目(HSQJ2005017)~~

摘　　要：宽浅陡槽水流试验研究表明,浅层急流的阻力大、稳定性差。当陡槽(B/h<40,hk>1.04 m)末端水流呈"马鞍型"动量横向分布时,水流具有较强的稳定性;而当陡槽(B/h>40,hk<1.04 m)末端水流呈"椭圆型"动量横向分布时,就缺乏抗干扰能力,导致下游形成平面涡旋并挤压水跃。基于"介入式"方法,提出了采用潜没式三角翼体来调控浅层急流。利用三角翼对两翼底层水流产生的扰动产生两翼优势流,从而使水体能够抑制边界微小扰动的"多米诺骨牌"累加递增效应,提高了水流整体稳定性,改善了下游水流的衔接消能,效果良好。在此基础上,对三角翼体调控水流动量分布的机理进行了分析,探讨了三角翼体型设计原则及量纲一体型因子k的确定方法。The flow experiment of wide, shullow and steopflume in the paper indicates that the resistance loss of shallow supercfitical flow in the steep channel is more than that of the general open flow. The author analyzes the flow momentum distribution in wide and steep channel, and finds that when the ratio B/h 〈 40 and the discharge is larger（ hk 〉 1.04 m） , the flow momentum lateral distribution at the end of steep channel presents a saddle profile which has stronger stability, but when the ratio B/h 〉 40 and the discharge is smaller（ hk 〈 1.04 m）, the momentum lateral distribution presents a elliptical profile which has weak stability and can＇t restrain the boundary disturbance. Based on intervenient method, an new adjusting work is done through the submerged triangle wing. It can effectively restrain the progressive minor disturbance, named ＂Domino effect＂ and get satisfied effect. The author further discusses the controlling mechanism and the main factors, and obtains some designable principle and the dimensionless geometric factor k of submerged triangle wing for engineering.

关 键 词：浅层急流 动量模比系数 骨牌效应 潜没式三角翼体 量纲-体型因子 

分 类 号：TV653[水利工程—水利水电工程]