南京航空航天大学学报2024，Vol.56Issue(4)：687-697,11.DOI:10.16356/j.1005-2615.2024.04.011
低雷诺数翼型多目标优化设计研究
Multi-objective Optimization Design of Airfoil at Low Reynolds Number
刘宇琪 1夏天宇 1董昊 2程克明1
作者信息
- 1. 南京航空航天大学航空学院,南京 210016||南京航空航天大学非定常空气动力学与流动控制工信部重点实验室,南京 210016
- 2. 南京航空航天大学航空学院,南京 210016||南京航空航天大学非定常空气动力学与流动控制工信部重点实验室,南京 210016||南京航空航天大学航空航天结构力学及控制全国重点实验室,南京 210016
- 折叠
摘要
Abstract
In order to eliminate the nonlinear aerodynamic behaviour of a symmetric airfoil within the low angles of attack at low Reynolds number,this paper establishes a low Reynolds number airfoil optimization design procedure based on Gaussian process regression model and NSGA-Ⅱ multi-objective genetic algorithm coupled with RANS numerical method.Then this paper carries out the airfoil optimization design with the average cruise factor in the range of small angle of attack of multiple states as the objective function.The results show that the optimized airfoil exhibits pronounced geometric bump and effectively alters the position and type of the laminar separation bubble.The aerodynamic characteristics of the airfoil are significantly improved,and the nonlinear phenomenon of the lift coefficient within the small angle of attack range at Re=4×104 basically disappears.Further analysis reveals that the bump of the optimized airfoil enhances the convective influence of the wall,which enhances the resistance of the incoming flow to the upward pressure gradient,thus improving the airfoil aerodynamic characteristics.关键词
低雷诺数/气动力非线性现象/加点准则/翼型多目标优化/层流分离泡Key words
low Reynolds number/aerodynamic nonlinear phenomena/infill criterion/multi-objective optimization of airfoil/laminar separation bubble分类
航空航天引用本文复制引用
刘宇琪,夏天宇,董昊,程克明..低雷诺数翼型多目标优化设计研究[J].南京航空航天大学学报,2024,56(4):687-697,11.
