【摘要】 在飞行器布局设计过程中,其气动系数的计算至关重要,它直接关系着飞行器飞行稳定性。针对数值模拟方法、风洞试验方法以及单一NS方程方法存在的计算性能不足的问题,设计一种基于NS方程的飞行器气动系数有限元计算方法。方法分为两个阶段:建立方程与求解方程。在建立飞行器气动问题NS方程阶段,主要工作内容包括飞行器机翼结构建模、构建控制方程、确定边界条件;在求解飞行器气动问题NS方程阶段,主要工作内容包括方程离散化、划分网格、计算气动系数。结果表明:利用所提方法对飞行器气动系数进行计算时,综合性能指数达到9.5以上,远远高于其余三种传统方法,由此说明所提方法的计算能力更强,为飞行器合理布局与设计提供了重要的参考。更多还原

【Abstract】 In the process of designing the air vehicle, the calculation of aerodynamic coefficients is directly related to the flight stability. In order to overcome the shortcomings of numerical simulation, wind tunnel test and NS equation, this article puts forward a finite element method to calculate the aerodynamic coefficients of air vehicle based on NS equation. This method contains two stages: establishment of equation and solution of equation. In the stage of building NS equation of aerodynamic problem, the main work includes the modeling of wing structure, the construction of control equation and the determination of boundary conditions. In the stage of solving NS equation of aerodynamic problem, the main work includes the discretization of equation, the grid meshing and the calculation of aerodynamic coefficients. Simulation results show that, when the aerodynamic coefficients of air vehicle are calculated by the proposed method, the comprehensive index is more than 9.5, which is much higher than the three traditional methods. Therefore, the proposed method has stronger computational ability, which provides an important reference for the rational layout and design of air vehicle.更多还原