To solve the design problem of the axial-flow pump in a pumping station refurbishment projection in the South to North Water Diversion East Route, three-dimensional(3D)multi-parameter design of an axial-flow pump impeller was carried out by using BladeGen software. The whole axial-flow pump geometric model with designed impellers was established, and a structured mesh in the fluid domain was generated. The influences of design parameters of the impeller on the pump external hydraulic performance were analyzed through numerical simulations. Furthermore, the effects of a dominant parameter i.e., blade wrapping angle on pressure and velocity distributions over the blades and cavitation performance were clarified in terms of three wrapping angle profiles. According to the numerical results, design case 6, in which the hub ratio was 0.40, the maximum section thickness in the mid-chord was 10mm, and the blade section was airfoil B, was chosen eventually. In this design case, the pump head was 4.90m, the pump efficiency with suction and discharge pipes was 79.76%, and the impeller efficiency was 92.19% at the design flow rate. These performance parameters has met the design requirements, and were consistent with the corresponding experimental measurements. Therefore, the BladeGen software could produce more accurate 3D multi-parameter designs for an axial-flow pump impeller to reduce both number of design cases and workload in geometry modeling during the optimization process, and result in an improved pump efficiency.
YU Yun-Yun-,ZHOU Da-Qing-*,DAI Qi-Fan- et al. Three-dimensional multi-parameter design and experiment of axial-flow pump impeller[J]. Journal of Drainage and Irrigation Machinery Engin, 2019, 37(5): 393-399.
ZHANG Desheng, WANG Haiyu, SHI Weidong et al. Experimental investigation of pressure fluctuation with multiple flow rates in scaled axial flow pump[J]. Tran-sactions of the CSAM, 2014,45(11):139-145.(in Chinese)
PENG Min,YANG Qiongfang, CHEN Zhimin,et al. Numerical design of an axial flow pump by means of parametric design, stress field and modal characteristics analysis[J]. Chinese journal of computational mechanics, 2016,33(1):121-126.(in Chinese)
ZHAO Haoru, YANG Fan, LIU Chao,et al. Analysis on the vortex flows and vortex suppression schemes of cube type inlet passage for pumping system[J]. Fluid machinery, 2016,44(3):1-5.(in Chinese)
YU Kang, CHENG Yongguang, ZHANG Xiaoxi. Hydraulic characteristics of a siphon-shaped overflow tower in a long water conveyance system: CFD simulation and analysis[J]. Journal of hydrodynamics, 2016, 28(4):564-575.
LI Yaojun, WANG Fujun. Numerical investigation of performance of an axial-flow pump with inducer[J]. Journal of hydrodynamics, 2007,19(6):705-711.
XIA Shuijing, YUAN Jianping, SUN Xiao, et al. Parametric modeling and multi-parameter optimization of axial-flow pump blade[J]. Journal of drainage and irrigation machinery engineering,2016,34(7):597-601.(in Chinese)
LIU Anran, SHI Jing, SHI Xiangzhong, et al. Optimization research for Francis hydro turbine blade based on the BladeGen[J]. Journal of Hebei University of Engineering(natural science edition), 2014,31(2):93-97.(in Chinese)
ZHOU Daqing, LIU Min, CHEN Huixiang. Siphon outlet conduit on full passage cavitation characteristics of axial-flow pumping unit[J].Journal of Huazhong University of Science and Technology(natural science edition),2017,45(1):128-132.(in Chinese)