Effect of gas pressure on the laws of propagation of spinning waves during filtration combustion

A three-dimensional mathematical model of filtration combustion with the combustion front propagating over a cylindrical specimen pressed from a powdered solid reagent and placed into an oxidizing medium is considered. Characteristics of spinning waves are studied for different pressures of the ambient gas. Steady waves of surface combustion are demonstrated to propagate over the specimen at low ambient pressures. For spinning waves formed at higher pressures, the characteristics may change nonmonotonically with increasing pressure, and the point with the maximum temperature may be located in the depth of the specimen.