何建京,王惠民. 粗糙床面明渠水力特性研究[J]. 水利水运工程学报, 2004, (3): 19-23.
引用本文: 何建京,王惠民. 粗糙床面明渠水力特性研究[J]. 水利水运工程学报, 2004, (3): 19-23.
HE Jian-jing,WANG Hui-min. Hydraulic characteristics of open channel flow over a rough bed[J]. Hydro-Science and Engineering, 2004, (3): 19-23.
Citation: HE Jian-jing,WANG Hui-min. Hydraulic characteristics of open channel flow over a rough bed[J]. Hydro-Science and Engineering, 2004, (3): 19-23.

粗糙床面明渠水力特性研究

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。

     

    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.

     

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