Intensification of MILD combustion of methane and hydrogen blend by the application of a magnetic field- a numerical study

The influence of an imposed magnetic field upon the behavior of a reacting flow under hydrogen-methane moderate or intense low oxygen dilution regime is investigated numerically. This is achieved through addition of a series of baffles close to the inlet nozzles of a well-characterized moderate or intense low oxygen dilution burner and applying variable intensity magnetic field therein. The resultant combusting flow under magnetohydrodynamic effects is modeled using a standard RANS scheme with the inclusion of detailed chemistry (GRI. 2.1.1), eddy dissipation concept model with the volume fraction and time scale constants of 3 and 1, respectively, and the discrete ordinates radiation model. The simulation results show that application of the magnetic field allows significant reductions in the air preheating temperature often required for moderate or intense low oxygen dilution combustion. Examination of the radial distribution of different chemical spices (CH2O, OH, and CHO) shows that the imposed magnetic field results in thickening of the reacting flow and intensification of heat release.