超声速隐身歼轰机概念设计数值模拟

为了提高军用飞机的空战和对面攻击能力,对歼轰机进行总体设计。采用CATIA软件,设计出隐身歼轰机的三维数字样机和武器挂载方案;基于物理光学法和等效电磁流法,采用自编的RCSAnsys软件,数值模拟歼轰机的数字样机在X、S和UHF波段下的RCS特性和强度分布特性;基于湍流模型的k-ε方程和控制理论的N-S方程,采用Fluent软件,数值模拟歼轰机的数字样机所在空气流场的压强和速度分布云图,得出整机的升阻特性。概念设计数值模拟结果表明：内置弹舱的歼轰机前向±30°的RCS均值≤-4.728 dBsm,超声速飞行时歼轰机的升阻比约等于5.6337。

Fighter-Bombers Conceptual Design

In order to improve the air combat and attack capability of military aircraft, the overall design of fighter-bomberwas focussed on. Using CATIA, a 3D digital prototype and weapon solution of the stealth fighter-bombers was designed.Based on the physical optics method and the equivalent electromagnetic flow method, using RCSAnsys, the RCS character-istics and intensity distribution characteristics of the fighter-bombers digital prototype in the X, S and UHF bands wasstudied. Based on k-ε equations of the turbulence model and N-S equations of the control theory, the distribution of pres-sure and velocity around the fighter-bombers digital prototype in air flow field with fluent software was studied, and the liftdrag characteristics of the aircraft was obtained. The simulation results showed that the range of the ± 30 °RCS characteris-tics of the fighter bomber was less than-4.728 dBsm, and Supersonic lift-to-drag ratio was approximately equal to 5.6337.