【摘要】 侧槽溢洪道被广泛运行于水利工程,但由于受场地、投资等限制,部分工程采用正堰与侧堰相结合的L型布置,导致槽内水流结构更加复杂。以景宁某工程溢洪道为例,采用Flow 3D三维仿真软件模拟了L型侧槽溢洪道进口段的水流结构,并结合水工模型试验,对槽内的水流流态、流速分布、水面线、压强和消能率等水力特性参数进行了对比分析。结果显示L型溢洪道侧槽内正、侧堰两股水流相互作用后,可有效提高过流能力,降低侧槽内水位,增加消能率;其次,数值模拟计算结果与水工模型试验基本吻合,进一步表明三维数值模拟在研究复杂水流结构时的可行性,成果可为类似工程的研究提供参考。更多还原

【Abstract】 The side channel spillway is widely used in hydraulic engineering. When L-shaped side channel spillway is combined with the main weir and the side weir,the flow structure in the side channel is very complex. In this paper,Flow 3D flow calculation software is used to simulate the flow structure of L-shaped side channel spillway. Combined with the results of hydraulic model test,the hydraulic characteristic parameters such as the flow pattern,velocity distribution,water surface line,pressure and efficiency in side channel are compared and analyzed. The results show that the numerical simulation results are in good agreement with those in the hydraulic model test.The interaction between the main weir and the side weir flow in the L-shaped spillway can effectively improve the overflow capacity,reduce the water level in the side channel and improving energy dissipation rate. At the same time,it further shows the feasibility of three-dimensional numerical simulation,which can provide reference for similar projects.更多还原