U形弯道建闸对水流运动特性的影响试验

试验研究在U形弯道上建闸后水流运动特性的变化,结果表明弯道设闸使弯道不同位置凹岸、凸岸及中线水位产生显著差异,从而导致水面横比降变缓、水流动力轴线变光滑、流速分布变均匀,为深入分析建闸后弯道水流特性及建闸对泥沙运动、河床演变等的影响研究提供借鉴。

Experimental study on influences of sluice construction in a U-shape bend on characteristics of flow motion

The characteristics of flow motion in a U-shape bend after a sluice construction were studied through flume experiments.The experimental results show that there are obvious changes of water levels at the convex and concave sides and the center line of the bend before and after constructing a sluice.It results in gentle transverse gradient of water surface,smooth dynamic axis of flows and uniform distribution of flow velocity.It is in favor of deeply analyzing the characteristics of flows in bends with sluice construction as well as the influences on sediment motion and riverbed evolution,etc.