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为提高核主泵的水力性能,从结构方面考虑,利用数值模拟方法对核主泵进行了全流道三维模拟仿真,研究了叶轮叶片数为5~9的叶轮内部流动特性,探讨了叶轮叶片数与叶片反击系数之间的联系,并分析其与叶片泵性能之间的关联。结果表明,叶轮叶片数适当增加,对提高叶片反击系数和泵的整体性能是有利的,而叶轮叶片数过多或过少均将引起叶片反击系数的下降。在叶轮叶片数为7时,叶片反击系数和效率均达到了最高值,对叶片泵的优化设计具有一定的参考价值。
In order to improve the hydraulic performance of the nuclear main pump, from the aspect of structure, a three-dimensional full-flow simulation of nuclear main pump was carried out by numerical simulation. The internal flow characteristics of the impeller with 5 to 9 impellers were studied. The relationship between the number of blades and the blade back-off coefficient was analyzed and the correlation between the blade pump performance and the blade pump performance was analyzed. The results show that the appropriate number of impeller blades increases, which is beneficial to improve the blade counter-counterfactor and the overall performance of the pump. However, too much or too little impeller blade will cause the decrease of blade counterattack coefficient. When the number of impeller blades is 7, the blade counterattack coefficient and efficiency reach the highest value, which is of certain reference value to the optimal design of vane pump.