排灌机械工程学报2016，Vol.34Issue(7)：602-607,6.DOI:10.3969/j.issn.1674-8530.15.0175
大型双向流道泵装置优化匹配与试验研究
Hydrodynamic optimization of large pump installation with two-way channel and experiment
摘要
Abstract
Large vertical pump installations with two-way channel have been widely used in reversible pumping stations .However , the optimal design theory and method for the two-way channel remain im-perfect , causing a low hydraulic efficiency in such an installation .Consequently , a vertical pump in-stallation with two-way channel is studied .By considering the velocity uniformity at the outlet of entry channel and the hydraulic loss across the channel as two objective functions , the open height of the channel is optimized using CFD technique by comparing multiple design cases .It is shown that when the open height is equal to 0.57D the hydraulic loss increases less and the outlet velocity uniformity is also the best .The effects of discharge channel height on hydraulic performance of the discharge chan -nel are identified.A bigger discharge channel height can result in a higher discharge velocity and a more significant hydraulic loss .The hydraulic loss across the discharge channel decreases gradually with reducing discharge channel height .However , once the height is below a certain value , the diffu-sion hydraulic loss in the channel becomes dominant , causing an increasing hydraulic loss .This sug-gests that there is an optimal discharge channel height at which the minimum hydraulic loss is achieva-ble.This height is 0.48D.An optimum selected pump is installed in a pumping installation with the optimized two-way channel , then a hydraulic performance test on the installation is carried out , sho-wing 71.2%hydraulic efficiency at 3.26 m low net head.This two-way channel provides a reference for installation optimization of the same sort of pumps in the future .关键词
水力机械/泵装置/双向流道/三维流动/模型试验Key words
hydraulic machinery/pump device/two-way reversible channel/three dimensional flow/model test分类
农业科技引用本文复制引用
黄良勇,吴忠,张啸,李彦军..大型双向流道泵装置优化匹配与试验研究[J].排灌机械工程学报,2016,34(7):602-607,6.基金项目
“十二五”国家科技支撑计划项目（2015BAD20B01）；国家自然科学基金资助项目 （）
