排灌机械工程学报2012，Vol.30Issue(1)：40-45,6.DOI:10.3969/j.issn.1674-8530.2012.01.009
竖向进水管布置对泵站进水流态的影响模拟
Simulation of vertical inlet pipes layout effect on pump inflow patterns
摘要
Abstract
The flow field in the intake and suction pipe of a pump station was simulated numerically by means of CFD software Fluent. In the computation,the finite volume method,3D unstructured mesh and steady incompressible RNG k-s turbulence model were applied. Moreover,both the hydraulic loss and mass-weighted velocity uniformity at pipe inlet were optimized based on CFD simulations. To investigate the effect of vertical suction pipe position on flow pattern at the pipe inlet, the flow fields in the pump intake and suction pipe were simulated when the suction pipe was located at various positions in the pump intake which were specified by two parameters: one is the distance from the entrance to suction pipe to bottom of the pump intake, the other is the minimum distance between the outside wall of suction pipe to the side wall of the pump intake. Those parameters were expressed as a fraction of the inner diameter D of suction pipe according to the current pump intake design specifications. The velocity uniformity and hydraulic loss were correlated to the two parameters. The results indicated that in the large pump stations equipped with horizontal centrifugal pumps reasonable large two parameters can ensure the flow pattern at the pipe inlet uniform to prevent the pump intake from sand sedimentation and allow the pump to be operated efficiently and stably. The simulation results suggest that the minimum distance between the outside wall of suction pipe to the side wall of the pump intake and thedistance from the entrance of suction pipe to bottom of the pump intake should be(0.4-0. 8)Z) and (0. 6 -0. 8) D, respectively,for reference in pump intake design.关键词
竖向进水管/进水流态/评价函数/后壁距/悬空高度/泵站Key words
vertical inlet pipe/flow pattern/evaluation function/backwall distance/suspension height/pumping station分类
农业科技引用本文复制引用
徐存东,杨柯,肖璐,宋永占,黄雄..竖向进水管布置对泵站进水流态的影响模拟[J].排灌机械工程学报,2012,30(1):40-45,6.基金项目
国家自然科学基金资助项目(41061046) （41061046）
华北水利水电学院高层次人才科研启动计划项目(201069) （201069）
