基于NSGA Ⅱ的七叶侧斜螺旋桨多目标优化设计  

Multi-objective optimization design of seven-blade oblique propellers based on NSGA Ⅱ

作　　者：孙鸣远 刘昕瑶 张皓 严俊 SUN Mingyuan;LIU Xinyao;ZHANG Hao;YAN Jun(Southern Marine Science and Engineering Guangdong Laboratory(Zhanjiang),Zhanjiang 524000,China;Nuclear Power Institute of China,Chengdu 610213,China)

机构地区：[1]南方海洋科学与工程广东省实验室(湛江),广东湛江524000 [2]中国核动力研究设计院,成都610213

出　　处：《兵器装备工程学报》2022年第12期51-58,共8页Journal of Ordnance Equipment Engineering

基　　金：国家自然科学基金项目(面上)(51975459);广东省海洋经济发展(海洋六大产业)专项资金(GDNRC[2021]42);南方海洋科学与工程广东省实验室(湛江)项目(ZJW-2019-01)。

摘　　要：为降低七叶侧斜螺旋桨激振力和噪声提高螺旋桨推进效率,采用NSGAⅡ算法,结合螺旋桨CFD数值预报方法,对螺旋桨的螺距和侧斜分布进行优化设计。采用B样条曲线对螺旋桨设计参数进行拟合,实现螺旋桨几何模型的参数化建模并保证优化拟合曲线的光顺性。将NSGAⅡ优化算法、螺旋桨CFD数值预报方法和B样条曲线参数化建模方法结合,形成完整的螺旋桨多目标优化流程。以E1619桨为母型桨进行优化设计,得到给定目标和约束条件下的最优解集。选取三组典型优化方案进行分析,螺旋桨一阶轴向力脉动水平、螺旋桨推进效率均得到优化,其中折中方案螺旋桨一阶轴向力脉动水平较原型桨下降6.7%,推进效率较原型桨提高1.4%。分析结果表明:降低螺旋桨螺距分布、提高靠近叶梢位置处的螺旋桨侧斜是降低一阶轴向力脉动水平提高推进效率的有益措施。In order to reduce exciting force level, reduce noise and improve propulsion efficiency of seven-blade oblique propellers, this paper proposes NAGA Ⅱ(non-dominated sorting genetic algorithm-Ⅱ) combined with the CFD numerical simulation method to optimize pitch distribution and skew distribution for propellers. The B-spline curve is used to fit the design parameters of the propellers to realize the parametric modeling of the propeller geometric model and ensure the smoothness of the fitting curve in the optimization process. In this paper, NSGA Ⅱ optimization algorithm, propeller CFD numerical prediction method and B-spline curve parametric modeling method are combined to form a complete set of multi-objective propeller optimization process. The propeller E1619 is taken as the prototype for multi-objective optimization design and the optimal solution set under the given objectives and constraint conditions is obtained. Three typical schemes are selected for analysis, and both the first-order axial force pulsation level and the propulsion efficiency have been optimized to a certain extent. The first-order axial force pulsation level of the propeller in the compromise scheme is 6.7% lower than that of the prototype propeller and the propulsion efficiency is 1.4% higher than that of the prototype propeller. The results show that reducing the propeller pitch distribution and increasing the propeller skew near the blade tip are useful directions to reduce the level of the first-order axial force pulsation and improve the propulsion efficiency.

关 键 词：螺旋桨优化 NSGAⅡ算法 B样条曲线 激振力 数值模拟 

分 类 号：U661.3[交通运输工程—船舶及航道工程]