飞行器气动与隐身综合特性数值分析

开展了飞行器气动与隐身综合特性数值研究,编制了相应的计算与分析程序。该程序的主要功能包括:飞行器外形参数化和计算网格的生成,气动特性计算(利用有限体积方法求解NS方程),隐身特性计算(利用时域有限差分方法求解Maxwell方程),飞行器气动与隐身综合特性分析。作为应用的一个实例,对一种带翼钝锥体的气动和隐身综合特性进行了分析,并设计出两种新的外形,新外形的气动和隐身综合特性与原形相比有明显提高。

Numerical Analysis on the Aerocraft Aerodynamics/Scattering Performance

The aerodynamics and stealth performance of hypervelocity aerocraft were researched using numerical method and the corresponding computing and analyzing program was implemented. This program includes four main parts: Gathering the parameters of the aerocraft outer shape and generating computing grids;Calculating the aerodynamics performance by numerically solving the N-S equations;Calculating the stealth performance using finite difference time domain method;Analyzing the synthetically performance of aerodynamics and stealth. To test our method, the aerodynamics and stealth performances of a blunt cone with three wings was calculated and analyzed, and two new profiles were designed. The results showed that the aerodynamics and stealth performances have been improved significantly.