叶片数对喷水推进低比转速轴流泵叶轮水动力性能的影响

喷水推进低比转速轴流泵是随着喷水推进技术的发展而产生的一种新泵型。针对一型低比转速轴流泵叶轮叶片数分别选取为5、6、7建立三组叶轮模型,选择RNG k-ε两方程涡粘模型进行叶轮内流场与功率、总压扬程、效率的数值模拟计算,得到三组叶轮的相关水动力曲线。在此基础上分析叶片数对低比转速轴流泵叶轮水动力性能的影响,得到叶片数对功率、总压扬程与工况点影响较大,而基本不影响最高效率的结论,为我国该类泵型的深入研究提供参考。

Inlfuence of blade number on hydrodynamic performance of impreller for waterjet low speciifc speed axial-lfow pump

The waterjet low speciifc speed axial-lfow pump is a new pump with the development of the waterjet technology. This paper builds the three impeller models with 5, 6, and 7 blades of a low speciifc speed axial-lfow pump, and carries out the numerical simulations of lfow ifeld interior impeller, total pressure head and effciency by a two-equation eddy viscosity model, RNGk-ε turbulence model to get their correlative hydrodynamic curve. After the analysis of the effects of the blade number on the hydrodynamic performance of the waterjet axial-lfow impellers, it can be concluded that the number of blades has greater inlfuence on the power, total pressure head and operation point, but little inlfuence on the highest effciency, which can provide reference for the further investigation of this type of pump.