Optimization design based on orthogonal experiment and CFD on fire pump impeller
HUANG Zhihui1,2, ZOU Ye1, WEI Changzhou1, ZHAO Fei1, ZHANG Hu1, LIU Houlin2
1.Mechanical Institute of Technology, Wuxi Institute of Technology, Wuxi, Jiangsu 214121, China; 2.National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China
Abstract：In order to improve the efficiency of large flowrate fire pumps, the L18(37)orthogonal table was constructed by selecting Z, β2, φ, d1, b2 as relevant factors. With three levels for each factor, 18 kinds of impeller model programs were established. Then, the computational fluid dynamics(CFD)software Fluent was used to analysis their internal steady flow. By applying range analysis, the influe-nce of the geometric parameters on the fire pump performance was analyzed, deciding the impact order of these parameters on performance, and ultimately the optimal model was determined. The result shows that more blades and larger wrap angle can improve the pump efficiency significantly while the efficiency is negatively correlated with the blade inlet diameter. At the same time, the biggest factor affecting the head is the number of blades with more blades resulting in higher head. The impact of blade outlet angle on the head is very small. Experimental results show that the efficiency of the optimized pump is higher than the original model by 4.5 % at the design point, and even higher than the natio-nal standards, which meets the design requirements. The feasibility of the method is verified by the orthogonal design method.
黄志辉,, 邹晔, 魏昌洲, 赵飞, 张虎, 刘厚林. 基于正交试验及CFD的消防泵叶轮优化设计[J]. 排灌机械工程学报, 2016, 34(12): 1040-1044.
HUANG Zhihui,, ZOU Ye, WEI Changzhou, ZHAO Fei, ZHANG Hu, LIU Houlin. Optimization design based on orthogonal experiment and CFD on fire pump impeller. Journal of Drainage and Irrigation Machinery Engin, 2016, 34(12): 1040-1044.
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