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| Optimization method for offset splitting blades based on advanced control flow theory |
| Jia Ruixuan, Xu Hong |
| （Key Laboratory of Condition Monitoring and Control for Power Plant Equipment(North China Electric Power University), Ministry of Education, Beijing 102206, China) |
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Abstract To overcome the shortcomings of fully depending on experience in the past while choosing the offset position and offset angle of splitting blades in centrifugal pump compound impellers, the advanced controlflow theory was used to optimize splitting blades design. First of all, on the basis of the fluid element stress conditions in flow passage of centrifugal backward sweep impellers, the equilibrium of force perpendicular to the streamline was established. Subsequently, along normal orientation to the streamline, the relevant formula between pressure gradient and relative velocity gradient was deduced from relatively movement Bernoulli equation. Furthermore, the relation between pressure gradient normal to the streamline and geometry structure was obtained. Then the prime offset location was identified by analyzing several correlative formulas. At the same time, splitting blade inlet was offsetted moderately to suction side to realize the after loading characteristic. The test results show that the analysis conclusions match the experimental data very well and are proved to be reasonable.
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Received: 31 December 2009
Published: 30 September 2010
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| [1]袁寿其,何有世,袁建平,等.带分流叶片的离心泵叶轮内部流场的PIV测量与数值模拟[J].机械工程学报,2006,42(5):60-63.Yuan Shouqi,He Youshi,Yuan Jianping,et al.PIV measurements and numerical simulations of flow in centrifugal pump impwllers with splitting vanes[J].Chinese Journal of Mechanical Engineering,2006,42(5):60-63.(in Chinese)[2]何有世,袁寿其,郭晓梅,等.带分流叶片的离心泵叶轮内三维不可压湍流场的数值模拟[J].机械工程学报,2004,40(11):153-157.He Youshi,Yuan Shouqi,Guo Xiaomei,et al.Numerical simulation for 3D incompressible turbulent flow in the impeller with splitting vanes of centrifugal pump[J].Chinese Journal of Mechanical Engineering,2004,40(11):153-157.(in Chinese)[3]付跃登,袁寿其,袁建平.带分流叶片离心泵研究现状与发展趋势[J].中国农村水利水电,2007(5):123-128.Fu Yuedeng,Yuan Shouqi,Yuan Jianping.Present status and development trends in centrifugal pumps with splitter blades[J].China Rural Water and Hydropower,2007(5):123-128.(in Chinese)[4]崔宝玲,朱祖超,陈鹰,等.长中短叶片离心叶轮内部流动的数值模拟[J].推进技术,2006,27(3):243-247.Cui Baoling,Zhu Zuchao,Chen Ying,et al.Numerical simulation of inner flow field in centrifugal impeller with long,middle and short blades[J].Journal of Propulsion Technology,2006,27(3):243-247.(in Chinese)[5]潘中永,袁寿其,刘瑞华,等.离心泵复合叶轮短叶片偏置设计研究[J].排灌机械,2004,22(3):1-4.Pan Zhongyong,Yuan Shouqi,Liu Ruihua,et al.Research on design for splitting vanes of compound centri-fugal pump impeller[J].Drainage and Irrigation Machinery,2004,22(3):1-4.(in Chinese)[6]徐大懋.先进控制流透平设计的展望[C]//中国工程热物理学会.热机气动热力学学术会议论文集,1999.[7]Friedrich J.Centrifugal Pumps[M].Berlin,Heidelberg:Springer,2008:76.[8]袁寿其.低比速离心泵理论与设计[M].北京:机械工业出版社,1997.[9]陈松山,周正富,何钟宁,等.离心泵偏置短叶片叶轮内部流动的粒子图象速度测量[J].机械工程学报,2008,44(1):56-61.Chen Songshan,Zhou Zhengfu,He Zhongning,et al.Particle image velocimetry measurement of internal flow characteristics of centrifugal pump impeller with deviated short splitters[J].Chinese Journal of Mechanical Engineering,2008,44(1):56-61.(in Chinese) |
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