粗糙床面明渠水力特性研究

详细信息

Hydraulic characteristics of open channel flow over a rough bed

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。
- 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
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.
- non-uniform flow,rough bed,vertical distribution of velocity,turbulence intensity,roughness coefficient,open channel