基于代理模型的喷水推进泵水力特性分析及优化

Surrogate-based Analysis and Optimization of Hydraulic Characteristics of a Water-jet Propulsion Pump

摘要:

采用代理模型的整体敏感度分析方法对模型泵的结构参数(叶轮叶片进口安放角和出口安放角) 进行优化设计。研究结果表明：叶轮出口安放角对喷水推进泵效率和轴功率影响较大，整体敏感度分别约为 95%和 68%；进口安放角的影响相对较小，整体敏感度分别为 5%和 32%。优化后的叶轮进口安放角和出口安放角分别为 0.69°和 3.92°，满足 Pareto 最优解，喷水推进泵效率提高了 1.7%，功率密度提高了 6%。

Abstract:

The structure parameters of the model pump(blade angles of impeller at inlet and at outlet)have been optimized by using the global sensitivity analysis method based on surrogate method. The results show that the performance of water-jet propulsion pump and shaft power are more sensitive to the blade angle of impeller at outlet with the total sensitivity of 95% and 68%. While，the performance of the water-jet propulsion pump and shaft power are less sensitive to the blade angle of impeller at inlet with total sensitivity of 5% and 32%. The optimized blade angles of impeller at inlet and outlet are respectively 0.69° and 3.92°，which satisfies the Pareto optimal solution， with the efficiency of the pump increased by 1.7% and the power density increased by 6%.