Simulation of Methane Jet Flame and Dual-Vortex Combustion Chamber Based on the Adaptive TPDF-ASOM Combustion Model

The design of advanced gas turbine combustors requires precise control of turbulent flames, and improving the accuracy and efficiency of simulation models is of vital importance. The complex nonlinear interactions between turbulence and chemical reactions have always been a challenge. This paper proposes a solution for an adaptive turbulent combustion model based on the local characteristics of turbulent combustion. Building on the research of dynamic adaptive combustion models and drawing on the ideas of turbulence simulation, this paper proposes a spatially adaptive combustion model. The new model is developed by integrating the transported probability density function (TPDF) combustion model with the algebraic second-order moment (ASOM) combustion model, and is thus termed the TPDF-ASOM model. Experimental data from methane jet flames and kerosene dual-vortex burners are used for validation. The results show that the new TPDF-ASOM composite combustion model has accuracy comparable to that of the TPDF model and can significantly reduce computational costs. A critical criterion can balance simulation accuracy and efficiency.