Abstract:
Unsteady modes of filtration combustion are studied with the use of a three-dimensional mathematical model. The model describes exothermic chemical interaction of condensed systems with active gases and formation of solid products. Unsteadiness of the filtration combustion modes is caused by instability of the plane combustion front. Formation of the periodic structure of the front of combustion of porous cylindrical samples with different cross-sectional shapes is studied. It is demonstrated that different periodic regimes of combustion-front propagation can occur under conditions of instability of the plane combustion front and deficit of the active gas mass inside the pores, depending on the cross-sectional shape of cylindrical samples and various methods of heat and mass transfer between the sample and the ambient gas medium. Periodic regimes of oscillatory (volume and surface) combustion for samples with a circular cross section, spinning mode for samples with a ring-shaped cross section, and complicated periodic regimes for samples with a rectangular cross section are obtained.
Keywords:
filtration combustion, front instability, mathematical modeling.
Citation:
A. N. Firsov, N. I. Ozerkovskaya, K. G. Shkadinskii, “Unsteady modes of filtration combustion”, Fizika Goreniya i Vzryva, 46:4 (2010), 3–12; Combustion, Explosion and Shock Waves, 46:4 (2010), 371–379
This publication is cited in the following 8 articles:
S. V. Kostin, P. M. Krishenik, K. G. Shkadinskii, “Cellular wave mode of the infiltration combustion of porous media”, Russ. J. Phys. Chem. B, 10:4 (2016), 651
S. V. Kostin, P. M. Krishenik, K. G. Shkadinsky, “Irregular and cellular wave structures in the combustion of porous media under conditions of natural gas infiltration”, Russ. J. Phys. Chem. B, 9:1 (2015), 62
A. P. Aldushin, T. P. Ivleva, “Counterflow combustion in conditions of fluid-dynamic instability: Influence of reaction conditions on finger parameters”, Int. J Self-Propag. High-Temp. Synth., 24:3 (2015), 107
A. P. Aldushin, T. P. Ivleva, “Counterflow infiltration combustion in conditions of fluid-dynamic instability: Fingering in low gas flow”, Int. J Self-Propag. High-Temp. Synth., 24:4 (2015), 182
S. V. Kostin, P. M. Krishenik, K. G. Shkadinskii, “Pulsating cellular regimes of infiltration combustion of porous media”, Russ. J. Phys. Chem. B, 9:3 (2015), 385
P. M. Krishenik, S. A. Rogachev, K. G. Shkadinskii, “Filtration combustion of a porous structure in a multicomponent gas environment”, Russ. J. Phys. Chem. B, 8:2 (2014), 172
S. V. Kostin, P. M. Krishenik, “Unsteady infiltration-mediated combustion in conditions of regulated quasi-isobaric flow of gaseous reagent”, Int. J Self-Propag. High-Temp. Synth., 22:2 (2013), 88
S. V. Kostin, P. M. Krishenik, S. A. Rogachev, K. G. Shkadinsky, “Combustion of porous solid reagent in quasi-isobaric flow of three-component gaseous reagent”, Int. J Self-Propag. High-Temp. Synth., 22:3 (2013), 129