Theoretical and experimental study of cellular structures in restricted filtration combustion of porous media

International Conference on Synthesis and Consolidation of Powder Materials

Krishenik, P.M.^1 ; Kostin, S.V.^1 ; Ozerkovskaya, N.I.^1 ; Shkadinsky, K.G.^2

Merzhanov Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, Chernogolovka

142432, Russia^1

Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka

142432, Russia^2

关键词: Annular gap;    Cellular structure;    Filtration combustion;    Heat Release Rate (HRR);    Porous cylinders;    Porous structures;    Reactive gas;    Temperature profiles;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/558/1/012018/pdf
DOI  :  10.1088/1757-899X/558/1/012018

来源: IOP

【 摘 要 】

Infiltration-mediated combustion of a thin porous cylinder in reactive gas was studied by mathematical modeling. Gas reagent is infiltrated through an annular gap left of the side surface. In conditions of instability, the self-sustained propagation of individual cellular spots of exothermic combustion was observed. The structure of cellular waves, their dynamics, and travel direction are defined by such factors as temperature profile, pressure gradients, heat release rate, porous structure, and heat losses. Cellular combustion of Ti powder in dish was also explored experimentally and the results were compared with theoretical predictions.