Filtration combustion instability with lean premixed hydrogen／air in porous media
1.Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education), Northeastern University, Shenyang, Liaoning 110004, China; 2.School of Civil Engineering, Shenyang University of Technology, Shenyang, Liaoning 110870, China; 3.Key Laboratory of Clean Combustion for Electric Generation and Heating Technology of Liaoning, Shenyang Institute of Engineering, Shenyang, Liaoning 110136, China
Abstract： The evolution of flame front inclination instability and the property of cellular structure combustion waves with hot spots were determined during the superadiabatic combustion wave propagation for different filtration velocity and hydrogen concentration. The dynamic factor leading to the filtration combustion wave instability was analyzed. The evolution mechanism and the characteristics for lowvelocity filtration combustion instability were verified. The results show that the flame front inclinational instability develops continuously when the flame has an initial tiny inclinational angle. When the experimental condition parameters are changed, the cellular structure combustion waves may emerge at the upstream side of the combustor. The cellular structure combustion waves have strong effect on the stability of the main combustion wave propagation, and can depress the main wave propagation velocity. When the main combustion wave leaves combustor, the cellular structure combustion waves distribute randomly and stand in combustor.
2013, Vol. 34 
