弯曲溢洪道泄槽内不同整流措施对比研究

Comparative study on different rectifying measures in chute of curved spillway

为了对比研究不同整流措施对弯道流态的改善效果,本文通过数值模拟方法建立了无措施、布置导流墙、丁坝、斜底槛四种模型,通过模拟结果可以发现布置导流墙后,可以减小弯道水流惯性力,流态得到一定改善。布置丁坝后流态较导流墙效果不明显,但主流区被导向凸岸,对凸岸具有一定防冲刷作用。布置斜底槛后,下游的左右岸水力要素分布均匀,而且旋涡较多,具有导流与消能的双重作用。

In order to compare the effect of different rectifying measures on the improvement of flow pattern in the bend,this paper established four models by numerical simulation method,including no measures,layout of diversion wall,spur dike and inclined sill.Through the simulation results,it can be found that after the layout of diversion wall,the flow inertia force in the bend can be reduced,and the flow pattern can be improved to a certain extent.Although the main flow area is directed to the convex bank,which has a certain anti-scouring effect,the improvement was less obvious than the diversion wall.After the inclined sill is arranged,the hydraulic elements on the left and right banks of the downstream are evenly distributed,with more vortices,which have the dual functions of diversion and energy dissipation.