Linetype optimization and experiment on volute outlet passage in large pumping stations
Li Yanjun1,Yan Dengfeng2,Yan Hongqin3,Hu Deyi4,Feng Xusong5
(1.Technical and Research Center of Fluid Machinery Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China;2.Yangzhou University,Yangzhou,Jiangsu 225009,China;3.Hydraulic Engineering Science and Technology Consultation Limited Company of Jiangsu Province,Nanjing,Jiangsu 210029,China;4.Shanghai Investigation,Design and Research Institute,Shanghai 200434,China;5.Jiangsu Water Supply Co Ltd,for East Route of South-to-North Water Diversion,Nanjing,Jiangsu 210029,China)
Abstract: After optimum hydraulic design and model test with series of schemes,the major geometrical parameters with excellent hydraulic performances are obtained for the outlet volute passages of large pumping stations.The guide-water cone was optimized by hydraulic design,and the radius of the volute curvature was increased while the width of the outlet passages was not changed and the length of expansive channel was lengthened.With the ratio(10.27) of prototype and model,blade angle(-2°) and speed(1 400 r/min) remained unchanged,the highest efficiency of pump sets with the volute passage is over 78%,which has increased by 6% than before and has exceeded the level of vertical pump set with the commonly used structural types of inlet and outlet passages.
[1]仇宝云,黄季艳,袁寿其,等.南水北调东线工程水泵机组结构选择[J].机械工程学报,2003,39(1):69-73.Qiu Baoyun,Huang Jiyan,Yuan Shouqi,et al.Structure selection of pump units of south-to-north water transfer project in the east of China[J].Chinese Journal of Mechanical Engineering,2003,39(1):69-73.(in Chinese)[2]张仁田.南水北调工程中大型泵站泵型选择的若干问题[J].水力发电学报,2003(4):119-127.Zhang Rentian.Key issues in the selection of pumps and their systems for the project of water transferring from south to north in China[J].Journal of Hydroelectric Engineering,2003(4):119-127.(in Chinese)[3]严登丰.泵站工程[M].北京:中国水利水电出版社,2005.[4]Constantinescu G S,Patel V C.Numerical model for simulation of pump-intake flow and vortices[J].Journal of Hydraulic Engineering,1998,124(2):123-134.[5]Constantinescu G S,Patel V C.Role of turbulence model in prediction of pump-bay vortices[J].Journal of Hydraulic Engineering,2000,126(5):387-391.[6]Jiahong Guo,Hongxun Chen,Jiarong Lu.Numerical method for simulation of three dimensional flow in outlet passage of pump station[J].Key Engineering Materials,2003,243-244:237-242.[7]陶海坤,祝宝山,曹树良,等.钟形进水流道吸水室后壁的优化设计[J].江苏大学学报:自然科学版,2007,28(3):228-231.Tao Haikun,Zhu Baoshan,Cao Shuliang,et al.Optimization design for back-wall shape of bell-like inlet passage in mixed-flow pump[J].Journal of Jiangsu University:Natural Science Edition,2007,28(3):228-231.(in Chinese)[8]陆林广,吴开平,冷豫,等.泵站出水流道模型水力损失的测试[J].排灌机械,2005,23(5):23-26.Lu Linguang,Wu Kaiping,Leng Yu,et al.Measurement for hydraulic loss of outlet conduit of pumping station[J].Drainage and Irrigation Machinery,2005,23(5):23-26.(in Chinese)