Abstract
In this study the combustion characteristics of the turbulent combustion of a gaseous fuel (methane) in a cylindrical combustion chamber were predicted numerically. For this reason; the equation of continuity, momentum, energy, chemical reaction rate, turbulent kinetic energy and turbulent kinetic energy dissipation rate equations were solved in polar coordinates using the K-ε turbulence model. The change of the axial velocity component, effective pressure, fuel mass fraction, mass fraction of the total combustion products, mass fraction of CO2, turbulent kinetic energy, turbulent kinetic energy dissipation rate and total enthalpy in the 3-dimensional turbulent polar region were predicted for different angle positions. The results were presented for θ = 72° for this study. The effect of fuel/air momentum was investigated on flow, heat and combustion characteristics. The chemical reaction rate was determined using the eddy-break up model.