The Effects of Added Hydrogen to Premixed Methane and Air in an MEMS Channel

In this paper, the effects of adding hydrogen to the composition of methane and air in a micro combustor were investigated by a three-dimensional numerical method. Firstly, the results of the current study in determining the wall temperature of the micro combustion chamber were compared with those obtained from the experimental and numerical results of previous research. Secondly, by confirming the numerical solution of this study, the effect of adding hydrogen to the mixture of methane and air on the distribution of temperature, pressure and outlet velocity of the gases was calculated numerically. The numerical results showed that adding a percentage of hydrogen to the mixture of methane and air led to nonlinear changes in the outlet velocity, pressure, and temperature. In addition, the results showed that by increasing the percentage of hydrogen to 2.5% and 5%, the maximum outlet velocity of the gases and minimum temperature were obtained in the micro combustor, respectively.