基于LES模型的箱涵式进水流道水中消涡装置分析

Analysis of vortex elimination devices in cube-type inlet conduit based on LES model

为解决某泵站箱涵式进水流道内部水涡问题,以该泵站箱涵式进水流道为研究对象,基于LES模型,求解5种不同消涡方案对应的箱涵式进水流道内部水涡时空演变过程,定量对比喇叭口处旋涡中心平均涡量变化。结果表明:采用流线型消涡锥和后消涡板方案箱涵式进水流道消涡的效果最佳,相比原方案旋涡涡心的平均涡量降低96.53%,喇叭管进口面的轴向速度分布均匀度为95.7%,速度加权平均角为86.4°,消涡效果较好。

In order to solve the problem of water vortex in cube-type inlet conduit of a pumping station in Donghu Reservoir of Shandong Province,the cube-type inlet conduit of the pumping station is taken as the research object.Based on the LES model,the temporal-spatial erosion process of the water vortex in cube-type inlet conduit under five different vortex elimination measures is solved,and the change of the average vorticity at the vortex center of the bell mouth is quantitatively compared.The results show that the water vortex elimination effect of the cube-type inlet conduit is the best when the streamlined vortex-eliminating cone and vortex-eliminating plate scheme are adopted.Compared with the original scheme,the average vorticity of the vortex center is reduced by 96.53%.The axial velocity distribution uniformity of the inlet surface of the bell pipe is 95.7%,and the weighted average angle of velocity is 86.4°.The water vortex elimination effect is remarkable.The research results can provide references for the settings of vortex elimination measures for cube-type inlet conduit of similar pumping stations.