Study on Flame Propagation and Quenching Process in Microchannels
In order to study the flame propagation and quenching process in the micro channel of the flame arrester element,a numerical model of flame propa-gation in a flat slit channel was established based on Fluent. Comparing the simulation results with the ex-perimental values,it was found that the maximum er-ror between the simulation results and the experimen-tal values was only 6.5％,and the accuracy of the numerical calculation model and the reliability of the simulation results were both high. Extracting the tem-perature change data of the flame in the micro chan-nel showed that the flame gradually stretches and e-ventually forms a "pointed" shape in the micro chan-nel,while the propagation speed first increased and then decreased. By analyzing the concentration distri-bution of OH radicals,it can be seen that the con-centration distribution of OH radicals also tended to increase first and then decrease. Secondly,by analy-zing the quenching process of the flame,it can be seen that the inlet flame speed and pore height were important factors that affect the quenching length,but the impact of temperature changes on the quenching length was relatively low.
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