Research on the Electromagnetic Scattering Characteristics of Wingtip Vortices

Abstract

The detection of aircraft wingtip vortices has always been a key issue for aviation safety and aircraft stealth. Previous work mostly used density variation and water vapor variation to calculate dielectric parameters and the distribution of radar cross section(RCS). Here, the atmospheric pressure variation around the aircraft are calculated and simulated using Ansys Fluent software and numerical models such as fluid mechanics N-S equation. To investigate the change of its scattering cross section, we calculated the fluctuations of the dielectric parameters around aircraft for the given data of atmospheric pressure fluctuations. Finally, we show the relation between RCS and radar receiving horizontal angle under three incident wave angles, and the change rule of RCS and receiving angle both in the horizontal polarization and vertical polarization cases. This conclusion has a positive effect on the study of the scattering characteristics of wingtip vortices.