城镇泵站侧向进水间隔墩与圆柱结合水流流态分析

Analysis of flow pattern in the lateral inlet of urban pumping station

应用CFD数值模拟技术对城镇泵站侧向进水间原设计、加隔墩、加隔墩与圆柱三种方案进行流场信息对比。结果表明,侧向进水间原设计1#进水间出现大尺度回流与低速区,设置隔墩后,大尺度回流消失,低速区范围大幅缩小;2#进水间水流主流偏流,底层水流翻转,设置隔墩后,偏流与底层水流翻转现象得到好转,加入圆柱后,上述现象进一步好转,流态更加平稳;设置隔墩与圆柱结合整流措施,2#进水间特征断面回流强度大幅下降,低速区进一步减小。

CFD numerical simulation technology is used to compare the flow field information under the three schemes: the original design, adding pier, adding pier and column. The results show that large scale flow with low velocity zone appeared in 1# intake chamber under the original design. Large scale backflow disappeared, the low-speed zone significantly reduced after setting separation piers; drift of mainstream, turnover of bottom water appeared in 2# intake chamber under the original design. Drift and bottom water turnover phenomenon has been improved after adding piers. The phenomenon is further improved after adding column piers; the return strength of the characteristic section decreased sharply, and the low velocity zone is further reduced in 2# intake chamber after setting piers and column.