Numerical Simulation of Double-Swirled Model Combustor Based on LES-PDF

In this paper, the AECSC two-phase program based on LES-PDF method was used to simulate the model combustion chamber GTMC(gas turbine model combustor), so as to verify the feasibility and reliability of the AECSC program and analyze the flow and combustion characteristics of the swirl combustion chamber. The non-reaction conditions of the GTMC were simulated respectively by Fluent 18.1 and AECSC. The relative errors between the calculated axial, radial and tangential velocities and the experimental results are all within 10%. The relative errors of the peaks of three velocities are within 20% at most statistical points. At the same time, the results show that the simulation accuracy of AECSC is better than LES of Fluent to some extent. The AECSC program was further used to simulate the reaction conditions of GTMC. In the reaction results, the range of time average temperature was close to the experimental results. The experimental "V-shaped" flame and internal and external low temperature reflux region were well reproduced, but the position of the high temperature region was somewhat higher than the experimental results. Generally speaking, the thermal results were in good agreement with the experimental results, especially in the simulation of liquid fog. These show that the method combining LES and PDF has a strong advantage in the simulation of turbulent combustion and can be the direction of future research and development.