Numerical study of The effect of different levels of inhomogeneity on turbulent flame length in combustion chamber

Combustion of a mixture of inhomogeneity reactants is a type of combustion that has been used since 1997. All previous studies have been done on this type of outdoor combustion. The aim of this study was to investigate the numerical effect of different levels of inhomogeneity on flame length at different velocities and ratios in closed space without the presence of ambient air and its influence on flame. In this numerical study, the configuration modeling of Navier Stokes equations using Reynolds averaging method has been used. The results show that the flame length during a given inhomogeneity has a low limit so that the flame length increases before and after the inhomogeneity. This length of inhomogeneity varies at different velocities and equivalence ratios. The results also show that the flame length in the non-premixed state is less than the flame length when the fuel / air mixture is almost pre-mixed in the ignition chamber but as the equivalence ratio decreases, the difference is expected to be equal. The lower flame length values in the non-mixed state will be greater than the near-mixed state. Also, the cross-sectional area of the flame inside the chamber changes significantly both in length and width by changing the length of the inhomogeneity.