In unstructured grid

open source was used to simulate the spray combustion process in annular combustor of a certain turbojet engine.At first

the k-ε two-equation model

EBU (eddy break up) -Arrhenius turbulent combustion model

and particle stochastic trajectory model were selected to simulate the physical process of flow field.Then implicit coupled algorithm was described for solving gas flow

the Lagrangian method was used to track the movement of droplets in the fluid region

and two-way coupling was used for the effect between gas phase and droplet phase.Distributions of temperature

mach number

velocity and pressure obtained from simulation experiments were reasonable

and distribution of temperature was roughly in accord with that of the literature.This shows that implicit coupled method can well simulate the flow fields in combustion chamber

and reflect internal flow features of it.