摘要
透水框架防冲促淤效果受透水框架长宽比、架空率及框架长度影响,采用控制变量法,探究透水框架长宽比及架空率对水流减速效用.研究结果表明,在架空率不变时,减速率随长宽比先减后增,且减速率在长宽比为16时取极大值.减速率随架空率增大而先增后减,架空率为4.8时,框架减速效果最佳.文章就减速率随架空率及长宽比的等高线图定量地描述其分布规律,并分析透水框架架空率及长宽比对河道水流减速率影响.
The effect of scour and siltation on permeable frames is affected by the length-width ratio of permeable frames,the length of span and the length of frame. The control variable method is adopted to study the effect of the length-width and ratio of permeable frames on the flow reduction. The results show that when the overhead rate is constant,the deceleration rate decreases firstly and then increases with the aspect ratio,and the deceleration rate takes the maximum value when the aspect ratio is 16. The deceleration rate increases firstly and then decreases with the increase of the overhead rate,and when the overhead rate is 4. 8,the frame deceleration effect is the best. The contour map of deceleration rate with overhead ratio and length width ratio is used to quantitatively describe its distribution law,and the influence of permeable frame ratio and ratio of length to width on flow deceleration rate of river channel is analyzed.
作者
陈晗
CHEN Han(Putian Water Group Co. Ltd of Fujian Province;Putian Water Conservancy Investment Co. Ltd of Fujian Province, Putian 351100, Chin)
出处
《江西水利科技》
2018年第1期41-45,共5页
Jiangxi Hydraulic Science & Technology
关键词
减速消能
长宽比
架空率
透水框架
河道治理
Deceleration energy dissipation
Length - width ratio
Overhead rate
Permeable frame
River regulation
