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| Quasi 3-D design and numerical simulation of high specific speed volute mixed-flow pump |
| YANG Jingjiang, YAO Dengjie, XIANG Qingjiang, LIU Chengqiang |
| National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
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Abstract In the light of little research work on high specific speed volute mixed-flow pumps, we applied the design method of combining non-viscous three-dimensional inverse design method with viscous three-dimensional direct problem to a volute mixed-flow pump with specific speed 603. Based on quasi three-dimensional pump design theory, we investigate the validity of three-dimensional hydraulic design method in developing the high specific speed volute mixed-flow pumps. During the three-dimensional inverse design, first a mixed-flow pump as the initial computational model was obtained by using two-dimensional hydraulic design technique, then the S-shaped velocity moment distribution along meridional streamlines was specified, finally a new volute mixed-flow pump was generated. To solve three-dimensional steady Reynolds averaged N-S equations, CFD software CFX, standard k-ε turbulence model and SIMPLE algorithm were used. The computations of the newly designed pump under three operating conditions including design condition, low flow rate and large flow rate conditions were performed to analyze its hydraulic performance. The numerical simulation results show that the newly designed pump has regular streamlines in impeller and volute flow passages, and the static pressure distribution in pressure side and suction side of the impeller is even and reasonable. The velocity moment distribution in the vicinity of impeller tip and hub from leading edge to trailing edge is nearly the same as S shape. Under the design operating condition the newly designed pump′s efficiency is higher than the initial pump′s, which is designed in the method of flow speed coefficients. The newly designed pump has fulfilled the requirement of hydraulic performance for high specific speed volute mixed-flow pump.
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Received: 27 March 2016
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| [1]关醒凡,杨敬江,袁建平,等. 高比转速斜流泵水力模型试验研究[J].水泵技术,2002(4):3-8. GUAN Xingfan,YANG Jingjiang,YUAN Jianping, et al.Experimental research of high specific speed mixed-flow pump[J]. Pump technology, 2002(4):3-8.(in Chinese)[2]曹树良,梁莉,祝宝山,等.高比转速混流泵叶轮设计方法[J].江苏大学学报(自然科学版),2005,26(3):185-188. CAO Shuliang,LIANG Li,ZHU Baoshan, et al.Design method for impeller of high specific speed mixed-flow pump[J].Journal of Jiangsu University(natural science edition),2005,26(3): 185-188.(in Chinese)[3]樊红刚,陈乃祥,杨琳,等.可调叶片混流转轮全三维反问题计算方法研究[J].水力发电学报,2003(1):95-101. FAN Honggang, CHEN Naixiang, YANG Lin, et al. Research on a full three-dimensional inverse method for the mixed-flow pump runner with adjustable blades[J]. Journal of hydroelectric engineering,2003(1):95-101.(in Chinese)[4]BONAIUTI D, ZANGENEH M, AARTOJARVI R, et al. Parametric design of a waterjet pump by means of inverse design, CFD calculations and experimental analyses[J]. Journal of fluids engineering, 2010,132(3): 319-328.[5]蔡佑林,王立祥,张新.混流泵叶轮三元可控速度矩的设计[J].流体机械,2005,33(11):13-16. CAI Youlin, WANG Lixiang, ZHANG Xin. Design of 3-D controlled velocity moment for impeller of mixed-flow pump[J]. Fluid machinery,2005,33(11):13-16.(in Chinese)[6]SAMBHRANT S, APURBA K R, KAUSHIK K. Design of a mixed flow pump impeller and its validation using FEM analysis[J]. Procedia engineering,2014(14): 181-187.[7]常书平,王永生,丁江明,等. 混流式喷水推进泵水力设计和性能预报[J]. 哈尔滨工程大学学报,2011,32(6):708-713. CHANG Shuping, WANG Yongsheng, DING Jiangming, et al. Hydraulic design and performance predictions of a waterjet mixed-flow pump[J]. Journal of Harbin Engineering University, 2011,32(6):708-713.(in Chinese)[8]BING Hao, CAO Shuliang, TAN Lei, et al. Effects of meridional flow passage shape on hydraulic performance of mixed-flow pump impellers[J]. Chinese journal of mechanical engineering, 2013, 26(3): 469-475.[9]KIM J H, AHN H J,KIM K Y. High-efficiency design of a mixed-flow pump[J].Science China: technological sciences,2010,53(1): 24-27.[10]施卫东,邹萍萍,张德胜,等.斜流泵性能预测与叶轮进出口环量分析[J].农业工程学报, 2011,42(9): 94-97. SHI Weidong, ZOU Pingping, ZHANG Desheng, et al. Performance prediction and circulation distribution ana-lysis at impeller inlet and outlet of mixed-flow pump [J].Transactions of the CSAE,2011,42(9):94-97.(in Chinese) [11]王春林,郑海霞,张浩,等.可调叶片高比转速混流泵内部流场数值模拟[J].排灌机械,2009,27(1):30-34. WANG Chunlin,ZHENG Haixia,ZHANG Hao,et al. Numerical simulation for adjustable high specific speed mixed-flow pump[J].Drainage and irrigation machinery, 2009, 27(1): 30-34.(in Chinese)[12]肖若富,陶然,王维维,等.混流泵叶轮反问题设计与水力性能优化[J].农业机械学报,2014,45(9):84-88. XIAO Ruofu,TAO Ran,WANG Weiwei,et al. Inverse design and hydraulic optimization of mixed-flow pump impeller[J]. Transactions of the CSAM,2014,45(9):84-88.(in Chinese)[13]施伟,张大庆,潘中永,等. 蜗壳式混流泵空化工况扬程下降机理[J]. 排灌机械工程学报,2013,31(10):851-855. SHI Wei, ZHANG Daqing, PAN Zhongyong, et al. Head degradation mechanism research on mixed-flow pump under cavitation conditions[J]. Journal of drai-nage and irrigation machinery engineering,2013,31(10):851-855.(in Chinese)[14]谈明高,吴贤芳,刘厚林,等. 高比转数蜗壳式混流泵的设计与试验[J]. 流体机械,2011,39(12):1-4. TAN Minggao, WU Xianfang, LIU Houlin, et al. Design and experiment for high specific speed mixed flow pump impeller and volute [J]. Fluid machinery,2011,39(12):1-4.(in Chinese)[15]关醒凡. 现代泵理论与设计[M]. 北京:中国宇航出版社, 2011.[16]查森. 叶片泵原理及水力设计[M]. 北京:机械工业出版社, 1988. |
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