水利水电技术2018，Vol.49Issue(2)：112-116,5.DOI:10.13928/j.cnki.wrahe.2018.02.017
整流罩在泵站肘形进水流道中的应用效果分析
Analysis on effect from application of fairing to elbow inlet passage of pumping station
摘要
Abstract
The elbow inlet passage is widely used in large-scale low-lift pumping station.However,the difference between the curvature radiuses of both the inner-side and the outer-side of the bending section is larger,and then more serious non-uniformity of flow is there at the outlet of the passage,thus the operation efficiency of pumping station is to be impacted.Aiming at this problem,a fairing device that is installed on the end of the elbow inlet passage is designed herein,while a comparative analysis between the conventional elbow inlet passage and the inlet passage installed with fairing device is made with the computational fluid dynamics approach.It is found out through the study that the inner-side flowrate is 28.4％ higher than that of the outer-side inside of the conventional elbow inlet passage.After installing fairing device on the end of the inlet passage,the uniformity of the flowrate distribution at the outlet of the inlet passage is basically unchanged,but the mean deviation angle of the flow at the outlet under the design operation condition is decreased by over 70％ from the original of 13.1 ° to 4.3°,while the pumping head is increased by 2.3％ and the pumping efficiency is increased by 2.5％.The above result shows that the fairing device can improve the flow pattern at pump inlet after decreasing the mean deviation angle of the flow at the outlet of the inlet passage,thus decreases the hydraulic loss inside of pump and increases pumping head and efficiency.The study has referential value for improving the hydraulic design of large-scale pumping station and enhancing its operation efficiency.关键词
泵站/肘形进水流道/整流罩/流动分布/水泵效率Key words
pumping station/elbow inlet passage/fairing/flow distribution/pumping efficiency分类
建筑与水利引用本文复制引用
王紫阳,杨凯,张兴毅,文天翼,付责,于永海..整流罩在泵站肘形进水流道中的应用效果分析[J].水利水电技术,2018,49(2):112-116,5.基金项目
国家科技支撑计划资助项目(2012BAD08B03) （2012BAD08B03）
