一种集成通用高超声速飞行器气动工程预测系统  

An integrated aerodynamic engineering prediction system for general hypersonic vehicle

作　　者：张晓天[1] 张冉[1] 李惠峰[1] 

机构地区：[1]北京航空航天大学宇航学院,北京100191

出　　处：《中国科学：信息科学》2012年第11期1423-1434,共12页Scientia Sinica(Informationis)

基　　金：国家自然科学基金(批准号:61174221)资助项目

摘　　要：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.A general integrated aerodynamic prediction system for hypersonic vehicle is presented. CAD/CG geometry modeling techniques are introduced for precise geometry configuration modeling. FEM technique and free mesh generation algorithm are used for fast model meshing. The finesse of the mesh is controlled by the element edge length, which is determined with a comprehensive consideration of the accuracy and computation cost. With this technique the Internet open source models can be downloaded and imported for prediction. A general program for panel analysis is developed and the outer normal of the panel can be corrected. Based on panel aerodynamics theory, including modified-Newton method, Prandtl-Meye method and tangent cone method, aerodynamic coefficients and derivatives of each panel are calculated and then the total coefficients and derivatives of vehicle can be obtained by summation. The aerodynamics forces, moments and aerodynamic derivatives of the vehicle can all be obtained. By introducing software integration technique, the geometry configuration modeling, panel generation, panel analysis and post process are all integrated in a software system. With this system, the aerodynamic coefficients calculation and analysis of hypersonic vehicle could be implemented automatically. The simulation results of HTV-2 and space shuttle demonstrate the feasibility of this aerodynamic engineering prediction system.

关 键 词：高超声速飞行器 气动工程预测 计算机辅助设计 有限元法 软件集成 

分 类 号：V221.3[航空宇航科学与技术—飞行器设计]