Effect of Heat Recirculation in Biomass Flame Stability within a Cylindrical Micro-combustor (TECHNICAL NOTE)

Flame stability inside a cylindrical micro-combustor was studied. Considering the occurrence of heat recirculation, the respective relations were written; with parameters such as motion speed of reactants, flame propagation speed and thermal conductivity of the combustor wall. The flame stability as well as its location inside the micro-combustor were also studied. It was found that for each thermal conductivity of the combustor wall, there was only one point inside the micro-combustor. If the flame was formed in that point, it would remain stable inside the micro-combustor. It was also found that for each thermal conductivity of the combustor wall, the flame inside the combustor remained stable, only in one specified range of motion speed of the reactants. In addition, blow-off limits were obtained for high and low speeds of reactants inside the combustor for different values of thermal conductivity of the combustor wall.