摘要
在机翼翼尖加装小翼可以增升减阻,但小翼外形的不同设计参数对诱导阻力的减少程度大小不一。本文利用AVL软件分析了水陆两用飞机带不同小翼的机翼气动性能,并用实验设计的方法研究小翼外形的不同参数对机翼阻力系数的影响。本文提出了用两级响应面模型构造机翼阻力系数和小翼外形参数的回归模型,并对这个回归模型进行优化以得到最优的外形参数。本文把这个结果和用遗传算法优化得到的结果相比较,结果基本一致,说明本文提出的两级响应面模型及其优化方法是可行有效的。
The winglets installed on the wingtips are used to improve the wing efficiency by decreasing the induced drag. But the different shape parameters of winglets have various effects on the induced drag. This paper firstly calculates the aerodynamic characteristics of the amphibian wing equipped with different winglets by the AVL software and uses the experimental design method to analyze the relation between the drag coefficient of the wing and the different shape parameters of winglets. Then a two-level respond surface model to construct the regression model about the relation is proposed. The regression model is used to obtain the optimum shape parameters. The optimum result is almost same to the result from the optimization by the genetic algorithm. So the result shows that the two-level respond surface model and its optimization method are feasible and effective.
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
2008年第4期469-474,共6页
Journal of Nanjing University of Aeronautics & Astronautics
关键词
翼尖小翼
涡格法
响应面法
AVL软件
wingtip-winglets
vortex lattice method
respond surface method
AVL software
