S型河道对溢流坝挑流水力特性影响研究

Study on Influence of S-Type Channel on Hydraulic Characteristics of Overflow Dam

针对弯道水流中的S型弯道水流对溢流坝挑流的水力特性的影响进行研究,通过Flow-3d软件对S型弯道处溢流坝的挑流进行数值模拟。结果表明,右岸比左岸的流速、挑距、河道压强变化较明显、差异性大,这将影响下游河道的左右岸地形发生不对称式变化,对河道两岸及坝体稳定不利,因此避免在S型弯道处修建大坝。

Curved water flow has always been major topic in hydraulic engineering research.This paper mainly studies the influence of S-shaped curved water flow in curved water flow on the hydraulic characteristics of overflow dam picking,and S-bend through Flow-3d software.The flow of the overflow dam at the road is numerically simulated.The results show that the flow velocity,picking distance and river pressure of the right bank are more obvious than the left bank,and the difference is large.This will affect the asymmetrical changes of the left and right bank topography of the downstream channel,which is unfavorable to the stability of the riverbank and the dam,so avoiding it in S construction of dam at curved corner.