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本文建立了一种面向高超声速飞行器的集成通用气动预测系统.通过引入CAD/CG建模技术实现了复杂飞行器3D几何模型的快速准确建模,并可以利用网络上的共享模型资源直接计算.引入FEM技术和自由网格生成算法,实现了复杂飞行器模型的快速网格生成.设计并开发了通用面元几何分析程序,建立了外法线快速矫正方法.基于面元气动分析理论开发了面元气动分析求解器,实现了面元气动计算和整机气动参数整合,能计算飞行器的气动力、力矩和气动导数.通过软件集成调用技术,将几何建模、面元划分、面元分析、面元气动计算以及后处理集成在统一的软件系统中,实现了高超声速飞行器气动参数的全自动计算与分析.HTV-2和航天飞机的仿真计算结果表明了该系统的有效性.
In this paper, an integrated general aerodynamic prediction system for hypersonic vehicles is established, which can be used to quickly and accurately model the 3D geometric model of complex aircraft by introducing CAD / CG modeling technology, and can be directly calculated by using the shared model resources on the network. FEM technology and free grid generation algorithm to realize the rapid mesh generation of complex aircraft model.A universal face element geometric analysis program was designed and developed and a method of rapid correction of external normal was established.Based on the theory of face element aerodynamic analysis, The aerodynamic analysis solver realizes the integration of the aerodynamic parameters of the plane and the aerodynamic parameters of the whole machine and can calculate the aerodynamic forces, moment and aerodynamic derivatives of the aerocraft. Through software integrated call technology, the geometric modeling, faceting, face analysis, Meta-aerodynamic calculation and post-processing are integrated in a unified software system to realize the full automatic calculation and analysis of aerodynamic parameters of hypersonic vehicles.The simulation results of HTV-2 and space shuttle demonstrate the effectiveness of the system.