Simulation of Conceptual Designs of a Three-Surface Stealth Strike Fighter

Abstract

A conceptual design of a three-surface strike fighter was studied and stealth performance was taken into account to enhance survivability and battle effectiveness. CATIA was used to design the aircraft's three-dimensional prototype model and the weapon carriage arrangement was also studied. The aircraft's RCS characteristics and distributions under X, S, C, and L bands were simulated using the RCSPlus software, which is based on the PO method. Pressure and velocity distributions of the flow field were also simulated using CFD. A turbulence model was based on standard k-ε function and N-S functions were used during the CFD computation. Lift coefficients, drag coefficients, and lift-to-drag ratio were obtained by aerodynamic simulation. The results showed that: (1) the average value of head-on RCS between ±30° is below -3.197 dBsm, and (2) the lift coefficient is 0.34674, the drag coefficient is 0.04275, and the lift-to-drag ratio is 8.11087 when the attack angle is 2.5°.

Accurate Analysis of Target Characteristic in Bistatic SAR Images: A Dihedral Corner Reflectors Case

“…For example, F22 is a flight equipped with many high-tech stealth techniques. One of the most important features is that its shape is strange, because the shape, consisting of unusual settled panels, is designed to avoid forming right-angle structures which can generate high RCS and make it easy to expose in the monostatic radar system [ 17 ]. The right-angle structures are often called dihedral corners whose effects are quite common in monostatic radar sensors.…”