Abstract：Correct selection of blade number is of vital importance to improve the impeller hydraulic performance.By studying latest data presented by foreign experts and analyzing various factors influencing flow separation and disc friction,the authors draw a conclusion which is opposite to the traditional view: increasing blade number is not an effective way to improve impeller hydraulic performance;instead,after determining wrapping angle of blade,width of impeller at exit and optimizing impeller discharge diameter,reducing blade number to some extent will be beneficial to raise impeller hydraulic efficiency and eliminating hump of pump head-capacity curve.The new theorem provides valuable reference for impeller designers in determining blade number of low specific speed impellers
严敬；潘光玉；阚能琪；王桃. 低比转速叶轮叶片数的选择准则[J]. 排灌机械工程学报, 2008, 26(1): 18-20.
YAN Jing, PAN Guang-yu, KAN Neng-qi, WANG Tao. Criteria of blade number selection for low specific speed impeller. Journal of Drainage and Irrigation Machinery Engin, 2008, 26(1): 18-20.
[1] 严敬.低比转速离心泵[M].成都:四川科学技术出版社,1999[2] 查森.叶片泵原理及水力设计[M].北京:机械工业出版社,1988[3] 丁成伟.离心泵与轴流泵[M].北京:机械工业出版社,1984[4] Lobanoff.Centrifugal Pumps:Design ＆ Application[M].Houston:Gulf Publication Company,1994[5] 陈乃祥.离心泵[M].北京:机械工业出版社,2003[6] Yan J,Lu H.A Program for Determining Impeller Geometric Parameters with Minimum Shaft Power[A].北京:海洋出版社,2003[7] Dick E.Optimum Design of Centrifugal Fans and Pumps[J].Europen Journal of Mechanical Engineering,1992,37(1):9-18[8] 阎永强,梁武科.遗传算法在离心泵叶片优化设计中的应用[J].排灌机械,2004,22(2):5-7[9] 戴玉姝,王霄,蔡兰.离心泵叶轮扭曲叶片参数实体造型方法探讨[J].排灌机械,2004,22(1):20-22
