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核主泵动静叶栅的参数匹配对水力性能有显著影响。为了提高核主泵整机效率,基于动静叶栅几何参数的匹配关系,采用正交试验方法,选取调控比面积的三因素及三水平,探讨比面积对泵水力性能的影响机制;基于各因素平均值,综合考虑叶轮和导叶几何参数及其交互作用对扬程、效率影响的显著性,确定最优组合方案。研究表明:比面积对扬程和效率影响显著,ξ取0.645时,动静叶栅几何参数达最优匹配度,此时扬程和效率均达峰值点。导叶叶片前缘区域,ξ对液流速度的影响较显著,导叶内部速度值呈线性下降趋势时,导叶叶片对液流的控制力较强。当ξ取0.645时,CFD验证HL达最小值。获得了最佳比面积ξopt为0.645,使泵的综合水力性能最优,叶轮和导叶水力损失最小,提高了核主泵整机性能。研究结果为核主泵动静叶栅水力设计,提供了理论依据。
The matching of the parameters of the main cascade of the main pump has a significant effect on the hydraulic performance. In order to improve the efficiency of the nuclear main pump, based on the matching relationship between the geometric parameters of static and dynamic cascades, the orthogonal experimental method was used to select the three factors and three levels of the area under control to explore the specific mechanism of the specific area on the pump hydraulic performance. Based on the factors The average, considering the geometric parameters of the impeller and guide vane and its interaction on the head, the significance of the impact of efficiency to determine the optimal combination of programs. The results show that the specific area has a significant effect on the lift and efficiency. When ξ is 0.645, the geometrical parameters of the dynamic and dynamic cascades reach the optimal matching degree, and the lift and efficiency reach the peak point at this time. In the leading edge of the guide vane, the influence of ξ on the flow velocity is significant, and when the internal velocity of the guide vane decreases linearly, the control force of the guide vane on the flow is strong. When ξ is 0.645, CFD verifies that HL reaches the minimum value. The optimum specific area ξopt is 0.645, which makes the pump have the best comprehensive hydraulic performance, the least hydraulic loss of the impeller and guide vane, and improve the performance of the main pump. The research results provide the theoretical basis for the hydraulic design of the main vane cascade.