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本文报导了有关蜿蜒河槽边界切应力分布的一些试验研究成果。该试验采用两个蜿蜒度分别为1.374和2.043的试验河槽对平槽流和溢岸流进行了研究。试验表明,对于平槽流,二次流、河槽蜿蜒度和河槽断面形状都对τ_b 值产生影响;对于溢岸流,在那些漫滩水流与主槽水流之间有较大流动存在的滩地上测得的τ_b 较大。同时,还分析了平槽水流的动力平衡。
This paper reports some experimental results about the shear stress distribution along the meandering channel. The experiment was conducted on two flat tidal and overland flows using two experimental flumes with meandering degrees of 1.374 and 2.043, respectively. The experimental results show that for the flat trough flow, the secondary flow, the meanderness of the trough and the cross-sectional shape of the trenches all affect the value of τ b. For the overflow bank, there is a relatively large tide between the floodplain and the main trough The measured τ_b on the ground is larger. At the same time, the dynamic balance of flat trough flow is also analyzed.