摘要
粗糙床面非均匀流的水槽试验表明,非均匀流断面的垂线流速分布需用两个对数公式分别描述;粗糙床面的流速分布较光滑床面不均匀;非均匀流的紊流度分布随相对水深的增大而趋于均匀;粗糙床面非均匀流糙率系数的变化规律与光滑床面近似.
Results of the flume experiments on non-uniform flow over a rough bed show that the vertical distribution of velocity on a channel section needs to be divided into two regions with different log velocity distribution equations. Velocity distribution on a rough bed is more non-uniform than that on a smooth bed, the turbulence intensity distribution of non-uniform flow becomes uniform with increase of the relative depth, and the regularities of the roughness coefficients of non-uniform flow on a rough bed are similar to those on a smooth bed.
出处
《水利水运工程学报》
CSCD
北大核心
2004年第3期19-23,共5页
Hydro-Science and Engineering
关键词
非均匀流
粗糙
明渠
流速分布
床面
水力特性
糙率系数
近似
对数
光滑
non-uniform flow
rough bed
vertical distribution of velocity
turbulence intensity
roughness coefficient
open channel