Effect of convex platform structure on hydrogen and oxygen combustion characteristics in micro combustor

Abstract The combustion characteristics of the micro combustor with a convex platform were simulated and the effects of the height of the convex platform and the inlet velocity on the combustion process were analyzed. The results show that the setting of convex platform can significantly increase the maximum velocity and reduce the outlet velocity. When the height of the boss continues to increase, the maximum velocity is more significant, but has little effect on the outlet velocity. At the same time, the increasing height of the convex platform increases, the turbulent kinetic energy and reduces the intensity of combustion on the axis. However further increase in the height does not reduce the effect significantly. The fuel conversion rate increases significantly, but the velocity decreases. In the micro combustor with a convex platform, increasing the inlet velocity increases the axial temperature, the fuel conversion rate decreases.