An asymptotic analysis of the combustion of a gas moving in a semiinfinite porous medium is performed for large values of the Zel’dovich parameter. The case of a highly porous medium with high gas permeability is considered. The basic terms of asymptotic expansions of the main parameters of the process for combustion and separation regimes are obtained by the method of joined asymptotic expansions. The effect of the rate of motion of the gas and heat transfer from the surface of the skeleton into the ambient medium on the combustion parameters is analyzed. The critical conditions of failure of stationary combustion at the external surface of the layer and the conditions of transition of the process to the separation and induction regimes are determined.
[1]
R. E. Collins.
Flow of fluids through porous materials
,
1961
.
[2]
E. N. Rumanov,et al.
Exothermic reaction regimes in a one-dimensional flow
,
1975
.
[3]
V. S. Babkin,et al.
Filtration combustion of gases
,
1983
.
[4]
A. A. Korzhavin,et al.
Flame zone in gas combustion in an inert porous medium
,
1982
.
[5]
V. S. Babkin,et al.
Effect of heat losses on propagation of stationary waves in filtration combustion of gases
,
1984
.
[6]
V. S. Babkin,et al.
Theory of filtrational combustion of gases
,
1984
.