排灌机械工程学报
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Journal of Drainage and Irrigation Machinery Engin  2015, Vol. 33 Issue (1): 26-30    DOI: 10.3969/j.issn.1674-8530.13.1048
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Structure optimization and flow numerical simulation in rotor cavity of roto-jet pump
Liu Yi, Chen Wenpeng, Liang Rundong, Han Zhengjie
College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China
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Abstract The flows in different structures of the rotor cavity in XP300-3 roto-jet pump are simulated by using the CFD software Fluent. The Reynolds-averaged Navier-Stokes equations, the standard k-ε turbulence model and SIMPLE algorithm are adopted in the simulations. According to the existing studies on rotor cavity structures, the cavity structure is optimized by using three configurations, namely adding a rib on the cavity outer surface, reducing the cavity axial width, integrating them together. The flows in the rotor-jet pumps with these configurations are simulated and their performances are extracted and compared with that for the original cavity structure. It is turned out that under the same working condition both added rib and reduced axial width are helpful to effectively reduce the residence time of fluid in the cavity and to shrink the cavity cross-section area as well as to relieve wear of pump casing. The configuration either with the rib or reduced width can improve pump head and efficiency significantly, especially for the head. For the configuration with both rib and reduced width, the pump is subject to remarked improvement in head and efficiency at the same operational condition. These results show that the rotor cavity structure can be optimized with a superposition approach.
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Articles by authors
LIU Yi
CHEN Wen-Peng
LIANG Run-Dong
HAN Zheng-Jie
Key wordsroto-jet pump   rotor cavity   structure optimization   numerical simulation     
Received: 2013-12-19;
Cite this article:   
LIU Yi,CHEN Wen-Peng,LIANG Run-Dong et al. Structure optimization and flow numerical simulation in rotor cavity of roto-jet pump[J]. Journal of Drainage and Irrigation Machinery Engin, 2015, 33(1): 26-30.
 
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