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针对某型飞机机翼污染后机翼性能改变问题,提出了一种基于流场和结构场耦合分析的机翼气动特性、结构特性检测方法.该方法首先应用有限元法对二维定常不可压粘流的时均N-S方程进行离散求解,采用四阶龙戈-库塔(RK)法求解水滴运动方程确定污染程度,然后利用流场和结构场耦合分析污染后的机翼特性,通过与未污染机翼气动特性和结构特性的情况对比,确定污染机翼性能变化并作出是否失效判断.通过机翼污染的相似实验结果表明,该方法能有效的应用于污染机翼的性能判断与优化设计.
Aiming at the problem of aero-wing wing air pollution after a certain aircraft wing pollution, this paper proposes a method to detect the aerodynamic and structural characteristics of aero wing based on coupling analysis of flow field and structure field. Firstly, finite element method The viscoelastic time-averaged Navier-Stokes equations were solved discretely. The fourth-order Runge-Kutta (RK) method was used to determine the degree of contamination of the water droplet motion equation. Then, the flow field and the structural field coupling were used to analyze the contaminated wing characteristics. The comparison of the aerodynamic characteristics and the structural characteristics of the contaminated wing to determine the change of the performance of the contaminated wing and to determine whether it is failed or not.Through the similar experimental results of the wing pollution show that the method can be effectively applied to determine the performance of the contaminated wing and optimize the design .