摘要
为了有效解决大扩散角明渠水流流动中产生的边界层分离、主流偏移等不良流态问题,实现水流均衡过渡与平顺连接,根据扩散段水流特性、边界层分离特点与偏流机理,从"强化两翼,抑制边界层分离"入手,利用潜没式三角翼对扩散段水流进行适度调控。模型试验表明,水流经三角翼调控后,主流沿扩散段两侧分流,两翼动量得到加强,消除了边界层分离与主流偏移现象,流态显著改善。试验比较了三角翼两种不同设计方案的调控效果,以设置配流孔的三角翼调控水流的效果为优。
In order to effectively solve the problems of the boundary layer separation and the mainstream deviation generated in the open channel flow with the large diffusion angle,this paper tended to realize the flow equilibrium transition and the smooth connection.According to the flow characteristics,the diffusion boundary layer separation characteristics and the deviation mechanism,this paper started from strengthening wings and inhibiting boundary layer separation and regulate the flow of the diffusion section by using the submerged triangle wing.The model tests showed that,after flow regulating,the mainstream was divided along the two sides of the diffusion section,and the momentum of the two wings was strengthened,which could eliminate the boundary layer separation and mainstream deviation.The flow pattern was remarkably improved.At the same time,the control effect of two different design schemes of the triangle wing was compared,and the effect of regulating the flow is optimized by setting the triangle wing with port orifice.
作者
王二平
吕臣
孙东坡
卓飞
刘晨晨
WANG Erping;LV Chen;SU Dongpo;ZHUO Fei;LIU Chenchen(North China University of Water Resources and Electric Power,Zhengzhou 450045,China)
出处
《人民珠江》
2018年第3期22-25,30,共5页
Pearl River
基金
国家自然科学基金平面大扩散角明渠流均衡过渡机理与三角翼调控方法(51579103)
关键词
大扩散角明渠流
水流流态
单宽动量分布
三角翼调控
配流孔
open channel flow with large diffusion angle
flow pattern
unit momentum distribution
triangle wing regulation
port orifice
