Grid Spacing Technology and Radar Scattering Character Research on Aircraft Wake Vortex

The article aim at radar detection of aircraft wake vortex and properly assume that numerical simulation of aircraft wake vortex is taken as a solution of passive conservative parameters,which fully describe the evolution of aircraft wake vortex with time and spacing distribution in stable state. Two order upwind difference method with non-uniform grid spacing, is used to solve Passive Conservative parameters. And then the evolution of RCS in aircraft wake vortex, which changes with time and frequency, is obtained. The simulation result proved superiority of non-uniform grid spacing technology in calculation time, calculation cost, and so on. By analyzing it, the measure of proper non-uniform grid spacing area is obtained, which establish theory foundation for the aircraft wake vortex detection model.