Aircraft pollutant emission and diffusion simulation method based on dynamic grid

The invention relates to an aircraft pollutant emission diffusion process simulation method based on a dynamic grid technology. The method comprises the following steps: determining a pollutant emission source and a mass fraction; determining the environment wind speed and temperature of the aircraft flight area; establishing a flow field area for emission and diffusion of pollutants around the aircraft; performing tetrahedral mesh generation on the flow field area by using Fluent to obtain a mesh file; compiling a UDF describing aircraft motion; the grid file and the UDF file are imported into Fluent; setting and solving are carried out in Fluent, and the pollutant emission and diffusion process in the flight process of the aircraft is obtained through simulation. Compared with the prior art, the simulation method is more suitable for the actual situation of aircraft operation, the pollutant emission and diffusion process in the aircraft flight process can be obtained more accurately at low cost, operation a