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.
[1]关醒凡.现代泵设计理论[M].北京:宇航出版社,2010:187-188.[2]张金凤,梁赟,袁建平,等. 离心泵进口回流流场及其控制方法的数值模拟[J]. 江苏大学学报:自然科学版,2012,33(4):402-407. Zhang Jinfeng,Liang Yun,Yuan Jianping,et al. Numerical simulation of recirculation control at centrifugal pump inlet[J]. Journal of Jiangsu University: Natural Science Edition, 2012,33(4):402-407.(in Chinese)[3]杨敏官,张宁,李忠,等. 基于 CFD 的离心泵侧壁式压水室优化设计[J]. 江苏大学学报:自然科学版,2013,34(1):28-32. Yang Minguan,Zhang Ning,Li Zhong,et al. Optimal design of centrifugal pump with tilt volute based on CFD[J]. Journal of Jiangsu University: Natural Science Edition, 2013,34(1):28-32.(in Chinese)[4]杨军虎,张建华,孙庆冲,等.叶片型线及厚度变化规律对离心泵性能的影响[J].兰州理工大学学报,2011,37(5):50-55. YANG Junhu,ZHANG Jianhua,SUN Qingchong, et al. Influence of variation of blade thickness and profile on centrifugal pump performance [J]. Journal of Lanzhou University of Technology, 2011,37(5):50-55.(in Chinese)[5]丁思云,杨博峰,邓国运,等.叶片数对螺旋离心泵离心泵内部流场影响研究[J].流体机械,2009,37(7):33-37. DIN Siyun,YANG Bofeng,DENG Guoyun,et al. Influence of blade number on interior flow of screw centrifugal pump [J]. Fluid machinery, 2009,37(7):33-37.(in Chinese)[6]BACHAROUDIS E C, FILIOS A E, MENTZOS M D. Parametric study of a centrifugal pump impeller by varying the outlet blade angle [J].The open mechanical engineering journal, 2008, 34(1):75-83.[7]张华娟,李春.几何参数对水泵性能的影响[J].农业机械学报,2007,38(4):203-207. ZHANG Huajuan,LI Chun. Effect of geometric parameters on pump performance [J]. Transactions of the CSAM,2007,38(4):203-207.(in Chinese)[8]朱亮.叶片厚度变化对轴流泵性能的影响[D].扬州:扬州大学,2008.[9]邴浩,谭磊,曹树良.叶片数及叶片厚度对混流泵性能的影响[J].水力发电学报,2013,32(6):250-255. BING Hao,TAN Lei,CAO Shuliang.Effects of blade number and thickness on performance of mixed-flow pumps [J]. Journal of hydroelectric engineering,2013,32(6):250-255.(in Chinese)[10]马雷,杨军虎.圆柱形叶片厚度动量损失求解[J].排灌机械工程学报,2005,23(3):6-10. MA Lei,YANG Junhu.Solving on momentum thickness for cylinder impeller [J].Journal of drainage an irrigation machinery engineer, 2005,23(3):6-10.(in Chinese)[11]叶道星,王洋.离心泵叶轮内部湍流动能及耗散率分析[J].中国农村水利水电,2012(4):84-88. YE Daoxing,WANG Yang.Turbulence kinetic energy and dissipation rate analysis of centrifugal pump impellers [J]. China rural water and hydropower,2012(4):84-88.(in Chinese)[12]王川,施卫东,陆伟刚,等.不同叶片厚度的不锈钢冲压进泵性能的模拟与实验[J].农业机械学报,2012,43(7):94-99. WANG Chuan, SHI Weidong,LU Weigang,et al. Effect and experiment of different blade thickness on stainless steel [J].Transactions of the CSAM, 2012,43(7):94-99.(in Chinese)[11]沈海涛,郑水英,应光耀.圆柱形叶片离心泵流场的三维数值模拟分析[J].流体机械,2005,33(12):12-15. SHEN Haitao,ZHENG Shuiying,YING Guangyao. 3-D numeric analysis on flow field in submersible centrifugal pump with cylindrical blades [J].Fluid machinery, 2005,33(12):12-15.(in Chinese)[14]蔡彬,程新群,付强,等.低比转速叶轮内不同叶片数流场计算及分析[J].农机化研究,2006(4):83-85. CAI Bin,CHENG Xinqun,FU Qiang,et al. Optimization design of low specific centrifugal pump based on CFD technique[J]. Journal of agricultural mechanization research,2006(4): 83-85.(in Chinese)