Influence of Cockpit and Inlet on Electromagnetic Scatterings for a Flying-wing Configuration

Abstract

The cockpit and inlet play an important role for aircraft stealth performance.In order to analyze the scattering characteristics of cockpit and inlet, four kinds electromagnetic models with different components are established.The influence of radar cross section(RCS)curve distribution, response of pitch angle and frequency are studied with Physical Optics method and RCS relative mean value.The results show that the scattering distribution is not changed by the cockpit and inlet with consideration of stealth design, and their distributions characteristics are similar.When the pitch angle increases, there exists small influence for the cockpit and the RCS relative mean values in nose, rear and circumferential directions of angular domains of inlet and mixed cockpit with inlet increase oscillatornly.When the frequency increases, there exist little effect on electromagnetic scattering of cockpit, and the the RCS relative mean values in nose and rear directions of inlet and mixed cockpit with inlet decrease oscillatorily.The influence of cockpit on electromagnetic scattering is weak, and the relative value in nose direction is between -2.4 to 1 dB; while the inlet has greater impact on electromagnetic scattering, and the relative value in nose direction is between 2 to 12 dB.

Keywords

• cockpit
• inlet
• electromagnetic scatterings
• stealth
• rcs
• aircraft