Effects of blade thickness on performance of low-specific-speed centrifugal pump
ZHAO Weiguo1,2, LIU Ming1, LIU Yi1, SHENG Jianping1, SONG Qice1
1.School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 2.Key Laboratory of Fluid Machinery and Systems, Gansu Province, Lanzhou, Gansu 730050, China
Abstract：In order to research the effects of blade thickness on the performance of a low-specific-speed centrifugal pump, a centrifugal pump with a specific speed of 48 was selected as a study object. With other geometric parameters fixed, five kinds of impellers with different blade thickness of a centrifugal pump were constructed. Based on the standard k-ε turbulence model and SIMPLE algorithm, numerical simulation was performed by commercial software Fluent under six different operation conditions. The relationship between the blade thickness and the hydraulic performance was analyzed from the external characteristics and internal flow. The results have shown that when the blade thickness increases in a certain range, the best efficiency point of the pump moves to the small flow direction and the top efficiency increases slightly. Additionally, the internal turbulence energy loss increases gradually under the design condition. Under the prerequisite of having meet the blade structural strength, selecting appropriate blade thickness could ensure the better hydraulic performance of a centrifugal pump.
赵伟国,, 刘明, 刘宜, 盛建萍, 宋启策. 叶片厚度对低比转数离心泵性能的影响[J]. 排灌机械工程学报, 2015, 33(12): 1033-1037.
ZHAO Weiguo,, LIU Ming, LIU Yi, SHENG Jianping, SONG Qice. Effects of blade thickness on performance of low-specific-speed centrifugal pump. Journal of Drainage and Irrigation Machinery Engin, 2015, 33(12): 1033-1037.
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