Integration Analysis of Conceptual Design and Stealth-Aerodynamic Characteristics of Combat Aircraft

ABSTRACT In order to study stealth strike-fighter, an analysis on stealth-aerodynamic integration and conceptual design is conducted. A conceptual 3-D digital model with internal antiship missiles and air-to-air missiles is designed in CATIA software. Based on the physical optics and equivalent electromagnetic current methods, using the self-programmed RCSAnsys software, the Radar Cross Section (RCS) characteristics and characteristics of scattering intensity distribution of the model are numerically simulated. Based on the turbulence theory of standard k-ε equations, using Fluent software, the pressure, velocity and lift-to-drag characteristics of the conceptual aircraft are numerically simulated. The simulation results show that the stealth and aerodynamic characteristics of the conceptual aircraft can be designed through integration analysis process, which can provide technical support to the design of the advanced operational aircrafts.

摘要：为开展隐身攻击战斗机的相关研究，本研究开展了隐身-气动一体化分析与概念设计工作。研究人员基于CATIA软件构建了一款内置反舰导弹与空空导弹的三维数字化概念模型。基于物理光学法与等效电磁流法，结合自研的RCSAnsys软件，对该模型的雷达散射截面（Radar Cross Section, RCS）特性及散射强度分布特征开展了数值仿真分析。基于标准k-ε方程的湍流理论，借助Fluent软件对该概念战机的压力场、速度场与升阻比特性开展了数值仿真。仿真结果表明，通过一体化分析流程可实现概念战机隐身与气动特性的协同设计，可为先进作战飞机的研发提供技术支撑。