Scattering Characteristics of Aircraft Wake Vortex Based on the FDTD Solution of Convection-Diffusion Equation

Aircraft wake vortex is a very series hazard in aviation, and the radar detection of it could serve as a good solution to monitor its behavior and predict its evolution. To study the radar scattering characteristics, this paper proposes to describe the dynamics of wake vortex with a convection-diffusion equation about some passive conservative variables such as water vapor, potential temperature, etc. Then the FDTD method is employed to solve this equation to get the temporal and spatial evolutions of wake vortex, which are then used to calculate the RCS of wake vortex.