Optimal design of low specific speed mixed flow pump impeller
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)
Abstract:To overcome the condition that there is short of work over rule of variation about radial parameters in allusion to traditional low specific speed mixed flow pump impeller design, a novel strategy using for reference of steam turbine axial flow impeller design experience is proposed. In the first instance, according to inner flow loss theory, the reason engendering secondary flow in impeller flow path passage section was clarified. Subsequently, a new method degrading secondary flow was discovered by advanced control flow theory. And then, radial parameters optimization design was achieved by NUMECA, a commercial CFD software on the condition of the vane parametric modeling. It can increase pump efficiency effectively. The calculation case shows that advanced control flow theory is an valid method to integrate inner flow analyzing and optimization design, and it can achieve impeller quickly and with high efficiency design.
[1]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)[2]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)[3]Oh H W,Kim K Y.Conceptual design optimizing of mixed flow pump impellers using mean streamline analysis[J]. Proceedings of the Institution of Mechanical Engineers,Part A:Journal of Power and Energy,2001,215(1):133-138.[4]Borges J E.A proposed through flow inverse method for the design of mixed flow pumps[J]. International Journal for Numerical Methods in Fluids,1993,17(12):1097-1114.[5]Uno Mitsuo,Matsunaga Shigenori,Miyazawa Hidetomo,et al. Studies on a diagonal flow pump: influence of tip clearance on efficiency and flow in a mixed flow impeller[J]. Transactions of the Japan Society of Mechanical Engineers,Part B,1990,56(525):1408-1414.[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]张人会,杨军虎,李仁年.离心泵叶轮的参数化设计[J].排灌机械,2009,27(5):310-313.Zhang Renhui,Yang Junhu,Li Rennian.Investigation on parametric design of centrifugal pump blade[J]. Drainage and Irrigation Machinery,2009,27(5):310-313.(in Chinese)