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 occurrence of heat recirculation, the respective relations were written and with parameters such as motion speed of reactants, flame propagation speed and thermal conductivity of the combustor’s wall, flame stability and its location inside micro-combustor were studied. It was found that for each thermal conductivity of the combustor’s wall, there is only one point inside the micro-combustor that if flame is formed in that point, it will be able to remain stable inside micro-combustor. It was also found that for each thermal conductivity of the combustor’s wall, flame inside the combustor remains stable only in one specified range of motion speed of 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’s wall.