水力发电学报2012，Vol.31Issue(3)：204-208,216,6.
30°斜式进水流道数模分析与泵装置特性试验研究
Numerical simulation of flows in 30° slanting inlet duct and model test of pump set
摘要
Abstract
Turbulent flows in a 30° slanting inlet duct were simulated by a 3-D numerical model,and its velocity field,velocity contours on cross sections and uniformity of axial velocity and flow angle at the outlet were obtained.Hydraulic performance and head loss of the inlet duct were calculated and analyzed.This study reveals that the flow in this duct of gradual contraction takes a good pattern of no separation trend or vortices,producing a head loss of 5.9cm only,and that at the outlet,the uniformity of axial velocity reaches 98.2% and the flow angle is 88.42° on average.These results show that the duct shape is reasonable.Through scale-model test of a 30°slanting pump set,the characteristic energy curves at five blade angles,NPSHc at three blade angles and the runaway speed at blade angle of-2° were obtained for the model and prototype pumps.The experimental results indicate that peak efficiency increase as the blade angle decreases,with its maximum of 83% at the angle of-4°.In a great range of operation condition the measured NPSHc is satisfactory and the runway speed is safe.This work provides useful information for hydraulic optimization of low water-head pumping stations.关键词
水力机械/斜轴泵站/进水流道/数值模拟/泵装置/模型试验Key words
hydraulic machinery/slanting axial pumping station/inlet duct/numerical simulation/pump set/model test分类
建筑与水利引用本文复制引用
陈松山,周正富,何钟宁,刘润根,薛丰进,连松锦..30°斜式进水流道数模分析与泵装置特性试验研究[J].水力发电学报,2012,31(3):204-208,216,6.基金项目
江苏省水利科技重点项目 （）
