%A GUAN Xing-fan, SHANG Ming-hua, XIE Wei-dong, FENG Xu-song %T Hydraulic model and its pilot-plant unit for rear bulb-type cross-flow pump %0 Journal Article %D 2008 %J Journal of Drainage and Irrigation Machinery Engin %R 10.3969/j.issn.1674-8530.2008.01.007 %P 25-28 %V 26 %N 1 %U {http://zzs.ujs.edu.cn/pgjx/CN/abstract/article_1414.shtml} %8 2008-01-25 %X According to the pump requirements of middle and low delivery lift and large flow capacity for the first-stage construction in South-to-North Water Transfers Eastern Route Project,and the actual pump characteristics in Jinhu Pump Station,a hydraulic model and its pilot-plant unit for the cross-flow pump were built.The flow field was calculated and analyzed by computational fluid dynamics(CFD) with FLUENT code,and the hydraulic model was optimized by repeated trials in the pilot cross-flow pump.The simulating results calculated by the hydraulic model(named JGZM-3) coincided with the actual results from the pretest in Jiangsu University and the retest in Hohai University.The testing parameters from the pilot cross-flow pump were as follows: delivery lift 2.82 m,flow capacity 342 L/s,power efficiency 79.05%,and cavitation specific speed 1 105.The pilot pump has the characters of large flow capacity and high power efficiency;and its overall performance indexes reach the advanced level,as the foreign made products.Compared with a like vertical axial-flow pump, the pilot cross-flow pump raised the power efficiency over 5% and flow capacity over 10%.