侧向进水泵站流态模拟及改善研究

发布时间：2018-04-09 14:44

本文选题：泵站　切入点：侧向进水　出处：《水利水电技术》2017年07期

【摘要】：为解决侧向进水泵站前池和进水池内部大范围漩涡问题,以某一具体泵站为工程基础,基于三维不可压缩流体的雷诺时均N-S方程和RNG k-ε湍流模型,采用ANSYS CFX软件对前池和进水池进行数值计算,采用定性方法分析了前池和进水池所选横断面流态,采用定量方法分析了进水池内部所选纵断面特征线上轴向速度均匀度。通过数值计算流线图发现:对于原始方案,水流以斜交形式进入进水池,侧向进水泵站2#至5#进水池右侧边壁处存在大范围回流区域;为改善原侧向泵站进水结构的不良流态,通过多方案整流措施的数值计算,相比于原方案,采用导流墙和立柱相结合的整流措施,前池及进水池内大范围回流区域消失,整流后进水池纵断面特征线上的轴向速度均匀度总平均提高18.15%,最大提高至27.82%。研究成果为改善侧向进水泵站流态提供了参考。
[Abstract]:In order to solve the problem of large-scale swirl in the forebay and inlet pool of the side inlet pumping station, a concrete pump station is used as the engineering foundation. The Reynolds time averaged N-S equation and RNG k- 蔚 turbulence model of three-dimensional incompressible fluid are used as the engineering foundation.The numerical calculation of the front pool and the inlet pool was carried out by using ANSYS CFX software. The cross section flow pattern of the front pool and the inlet pool was analyzed by qualitative method, and the axial velocity uniformity on the characteristic line of the selected vertical section inside the inlet pool was analyzed by quantitative method.Through numerical calculation of streamline diagram, it is found that, for the original scheme, the flow flows into the inlet pool in the form of oblique crossing, and there is a large area of backflow between 2# and the right side wall of the inlet water pump station, and in order to improve the bad flow state of the inlet water structure of the original side pumping station,Compared with the original scheme, compared with the original scheme, compared with the original scheme, by the numerical calculation of the multi-scheme rectifying measures, the reflux area of the front pool and the influent pool disappears in a large area by using the rectifying measures of the diversion wall and the column.The axial velocity uniformity on the characteristic line of the longitudinal section of the rectifier pool is increased by 18.15, and the maximum is raised to 27.82.The research results provide a reference for improving the flow state of the lateral inlet pumping station.
【作者单位】：扬州大学水利与能源动力工程学院;江苏省水利工程建设局;
【基金】：“十二五”国家科技支撑计划项目(2015BAD20B01-02) 国家自然科学基金资助项目(51609210) 江苏省自然科学基金资助项目(BK20150457) 江苏省研究生科技创新计划项目(SJLX16_0596)
【分类号】：TV675

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