| 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。 |
| 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 |
| DOI： |
| 分类号:TV133 TV543.1 |
| 基金项目: |
|
| Hydraulic characteristics of open channel flow over a rough bed |
|
HE Jian-jing,WANG Hui-min
|
| Abstract: |
| 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. |
| Key words: non-uniform flow,rough bed,vertical distribution of velocity,turbulence intensity,roughness coefficient,open channel |
