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首页> 外文会议>International Conference on Fluvial Hydraulics Vol.2, Sep 4-6, 2002, Louvain-LA-Neuve, Belgium >Velocity distribution and scouring in steep-curved channels
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Velocity distribution and scouring in steep-curved channels

机译：急弯通道的速度分布和冲刷

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摘要

At the Water Resources Institute of the University of Innsbruck experiments have been performed in an S-shaped trapezoidal channel with two bends and a slope of S = 0,01 ― with both fixed and erodible beds. Gravel with a mean diameter between 4,2 mm and 6,4 mm was used as bed material and for sediment feeding. Velocities were measured by means of a two-dimensional electromagnetic current meter. The analysis of the sxpriments yields a new function for the radial distribution of the depth-averaged longitudinal velocities that differs from the forced vortex approach. It is also shown that in the case of an erodible bed the redistribution of flow ― as a consequence of the evolution of scour on the outer and deposition on the inner bank ― leads to completely different radial velocity distributions compared with the initial bed.
机译：在因斯布鲁克大学水利研究所，我们在一个S形梯形通道中进行了实验，该通道具有两个弯曲度和一个S = 0,01的斜率-既有固定床又有易蚀床。平均直径在4.2毫米和6.4毫米之间的砾石用作床料和沉积物进料。用二维电磁电流计测量速度。 sxpriments的分析为深度平均纵向速度的径向分布提供了一个新函数，该函数不同于强制涡流方法。还表明，在易蚀床的情况下，流量的重新分配（由于外部冲刷的发展和内部堤岸的沉积的结果）导致了与初始床相比完全不同的径向速度分布。

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