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.
[1]关玉慧,黄思.基于CFD的旋喷泵水力设计及性能比较[J].中国农村水利水电,2010(2):28-30. Guan Yuhui, Huang Si. Rotary spray pump hydraulic design and performance comparison based on CFD[J]. China Rural Water and Hydropower,2010(2):28-30.(in Chinese)[2]余惠琼.旋喷泵内流场的数值计算及性能预测[J].中国农村水利水电,2007(2):21-25. Yu Huiqiong. The flow field in the jet pump of numerical calculation and performance prediction[J]. China Rural Water and Hydropower, 2007(2):21-25.(in Chinese)[3]许洪元,王晓东, 朱卫华,等.旋转喷射泵的研究开发进展[J].农业工程学报,2002, 18(2):188-190. Xu Hongyuan,Wang Xiaodong,Zhu Weihua, et al. Progress of the research and development of roto-jet pump[J]. Transactions of the CSAE,2002,18(2):188-190.(in Chinese)[4]刘宜,宋怀德,陈建新,等. 旋喷泵集流管进口形状对水力性能的影响[J].排灌机械,2009,27(6):367-372. Liu Yi, Song Huaide, Chen Jianxin, et al. The entrance shape of collecting pipe effect on roto-jet pump hydraulic performance[J]. Drainage and Irrigation Machinery, 2009,27(6):367-372.(in Chinese)[5]Steve O. The roto-jet pump: 25 years new [J]. World Pumps,1996(363):32-36.[6]王成木,黎成行,尹晓,等.旋喷泵水力性能的试验研究[J].水泵技术,2000(5):3-7. Wang Chengmu,Li Chengxing,Yin Xiao, et al. Experimental study on the hydraulic jet pump performance [J]. Pump Technology, 2000(5):3-7.(in Chinese)[7]程云章,朱兵,陈红勋,等.旋喷泵内部流动与能量损失分析研究[J].水动力学研究与进展:A辑,2004,19(5):598-603. Cheng Yunzhang, Zhu Bing, Chen Hongxun, et al. Analysis of energy losses and numerical simulation of flow field in the roto-jet pump [J]. Journal of Hydrodyna-mics:Ser A, 2004,19(5):598-603.(in Chinese)[8]杨军虎,张红霞,张光一,等.旋转喷射泵转子腔内液体的流动规律[J].兰州理工大学学报,2009,35(2):55-57. Yang Junhu, Zhang Hongxia, Zhang Guangyi, et al. The flowing law of liquid in the rotor cavity of roto-jet pumps[J]. Journal of Lanzhou University of Technology, 2009,35(2):55-57.(in Chinese)[9]齐学义,杨军虎,刘在伦.旋喷泵设计参数的分析讨论[J].流体机械, 1999(10): 19-21. Qi Xueyi, Yang Junhu, Liu Zailun. The analysis of roto-jet pumps design parameter [J]. Fluid Machinery, 1999(10):19-21.(in Chinese)[10]刘宜,宋怀德,陈建新,等. 旋喷泵集流管的设计方法及内部流场分析[J].兰州理工大学学报,2009,35(6):45-48. Liu Yi, Song Huaide, Chen Jianxin,et al. Design method of roto-jet pump and the analysis of internal flow field[J]. Journal of Lanzhou University of Technology, 2009,35(6):45-48.(in Chinese)[11]杨军虎,马希金.旋喷泵叶轮内的准三元流动计算[J].甘肃工业大学学报,1994,20(3):48-53. Yang Junhu, Ma Xijin. The quasi three dimensional flow calculation in impeller of roto-jet pump[J]. Journal of Gansu University of Technology, 1994,20(3):48-53.(in Chinese)[12]杨军虎, 齐学义, 马希金. 旋喷泵的效率分析及集流管的水力设计[J]. 甘肃工业大学学报, 1995, 21(2): 33-36. Yang Junhu, Qi Xueyi, Ma Xijin. Efficiency analysis and hydraulic design of the collector pipe about roto-jet pimp[J]. Journal of Gansu University of Technology, 1995, 21(2): 33-36.(in Chinese)[13]Visser F C, Dijkers R J H, Hopde Woerd J G. Numerical flow-field analysis and design optimization of a high-energy first-stage centrifugal pump impeller[J].Computing and Visualization in Science, 2000, 3(1/2):103-108.[14]Launder B E, Reece G J, Rodi W. Progress in the development of Reynolds stress turbulence closure[J]. Fluid Mechanics, 1975, 68(3): 537-566.[15]Feiz A A, Mould-Rouis G. Large eddy simulation of turbulent flow in a rotating pipe[J]. Mechanica Sinica, 2001, 17(4): 289-301.[16]王福军.计算流体动力学分析—CFD软件原理与应用[M].北京:清华大学出版社,2004.
