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.
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