Abstract:In order to improve the performance of single blade pumps, effects of blade outlet angle on the performance for a single blade pump were investigated based on numerical simulation and performance test. A single blade pump was designed, with different blade outlet angles β2 equal to 10°,14°,18°,22°,26°. ANSYS CFX was adopted to calculate flow filed, and SIMPLEC arithmetic and RNG k-ε turbulence model were adopted to solve the N-S equations. The flow velocity, pressure distribution, radial force and performance curve were obtained. The simulated H-Q was in good agreement with the experimental result. Numerical simulation results show that the blade outlet angle affects the performance curve greatly, the head, power and efficiency are all improved with the blade outlet angle increasing, however, the change is no longer significant after the blade outlet angle increased to 18°. As the main parameters of the single blade [JP2]pump are basically the same, the overall flow fields are [JP]similar in the single blade pump with different blade outlet angles, however, the flow separation in front of the pressure surface becomes serious with the blade outlet angle increasing. The relative velocity at the pressure surface decreases with the blade outlet angle increasing, thus increasing the efficiency of the single blade pump. The radial force of impeller and volute increase with the blade outlet angle increasing, what is more, the radial force of impeller is minimum near the design conditions and the radial force of volute decreases with the flow rate increasing.
谭林伟, 施卫东, 张德胜, 张扬, 张文全. 叶片出口安放角对单叶片泵性能的影响[J]. 排灌机械工程学报, 2017, 35(10): 835-841.
TAN Linwei, SHI Weidong, ZHANG Desheng, ZHANG Yang, ZHANG Wenquan. Effects of blade outlet angle on the performance for single blade pumps. Journal of Drainage and Irrigation Machinery Engin, 2017, 35(10): 835-841.
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