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| 3-D numerical simulation on transient characteristics of centrifugal pump during starting period |
| Yang Congxin, Wang Bin |
| (School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China) |
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Abstract In order to investigate the relationship between explicit transient performance and inner transient flow mechanism during starting period of a centrifugal pump, a mathematical model for unsteady starting and acceleration process was established, and the simulation was carried out to study the inner flow of a three dimensional centrifugal pump during the starting period.The RNG k-ε model was adoped as the turbulence closure. The transient flow structure and its evolutionary process during the blade staring period were analyzed. The explicit transient characteristic curve versus time was also given and compared with that of quasi steady hypothesis. The transient effect induced by the pump start up was studied qualitatively. The pressure distributions in impeller and volute were displayed to indicate pressure unbalance and serious pressure pulsation phenomenon, and which are the main reasons that induce impeller instability.
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Received: 09 September 2009
Published: 30 March 2010
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| [1]何有世,袁寿其,郭晓梅,等. 分流叶片离心泵叶轮内变工况三维数值分析[J]. 江苏大学学报:自然科学版, 2005, 26 (3): 193-197.He Youshi, Yuan Shouqi, Guo Xiaomei, et al. Numerical simulation for inner flow of impeller with splitting vanes of centrifugal pump under different operating condition[J]. Journal of Jiangsu University: Natural Science Edition, 2005, 26 (3): 193-197. (in Chinese)[2]Lefebvre P J, Barker W P. Centrifugal pump perfor mance during transient operation[J]. Journal of Fluids Engineering, Transactions of the ASME, 1995, 117(2): 123-128.[3]吴大转, 焦磊, 王乐勤. 不同启动加速度下离心泵瞬态水利性能的试验研究[J]. 工程热物理学报, 2008, 29(1): 62-64.Wu Dazhuan, Jiao Lei, Wang Leqin. Experimental study on transient performance of centrifugal pump under different starting acceleration[J]. Journal of Engineering Thermophysics, 2008, 29(1):62-64. (in Chinese)[4]吴大转, 王乐勤, 胡征宇. 离心泵快速启动过程外部特性的试验研究[J]. 工程热物理学报, 2006, 27(1):68-70.Wu Dazhuan, Wang Leqin, Hu Zhengyu. Experimental study on explicit performance of centrifugal pump during rapid starting period[J]. Journal of Engineering Thermophysics, 2006, 27(1):68-70. (in Chinese)[5]王洋,张翔,黎义斌. 离心泵变工况流场分析及径向力数值预测[J].排灌机械, 2008, 26(5):18-22.Wang Yang, Zhang Xiang, Li Yibin. Off design flow field analysis and radial force prediction of centrifugal pump[J]. Drainage and Irrigation Machinery,2008, 26(5):18-22.(in Chinese)[6]Goto A, Zangeneh M. Hydrodynamic design of pump diffuser using inverse design method and CFD[J]. Journal of Fluids Engineering, Transactions of the ASME, 2002,124(2):319-328.[7]Hamkins C P, Bross S. Use of surface flow visualization methods in centrifugal pump design [J]. Journal of Fluids Engineering, Transactions of the ASME, 2002,124(2):314-318.[8]Majidi K. Numerical study of unsteady flow in a centri fugal pump[J]. Journal of Turbomachinery, 2005,127(2):363-371.[9]Goto A, Nohmi M, Sakurai T,et al. Hydrodynamic design system for pumps based on 3 D CAD, CFD and inverse design method[J]. Journal of Fluids Engineering,Transactions of the ASME,2002,124(2):329-335. |
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