caa a22 4500 475810511 CHVBK 20180406123757.0 cr unu---uuuuu 170329e20000701xx s 000 0 eng 10.1007/BF02699474 doi (NATIONALLICENCE)springer-10.1007/BF02699474 Seplyarskii B. Institute of Structural Macrokinetics and Problems of Materials Science, Russian Academy of Sciences, 142432, Chernogolovka aut Ignition of porous bodies under conditions of counterflow nonstationary filtration of a gas [Elektronische Daten] [B. Seplyarskii] An analytical method for calculating the time characteristics of ignition of a porous body with outflow of an inert gas from the sample (counterflow nonstationary filtration) is developed employing the wave theory of ignition and an averaging technique using a certain weighting function. Numerical calculations confirmed the validity of the main assumptions of the theory on the stagewise nature of the ignition process and the wave mechanism of heating of the material. Complete qualitative and good quantitative agreement between conclusions of an approximate analysis and numerical results is shown. The error in determining the times of establishment of zero gradient and disturbance of temperature equilibrium does not exceed 50%. It is established that the equations of isothermal filtration are adequate for describing the process of gas escape from a porous body during ignition. It is shown that the gas mass flow can be calculated using a quasistationary approach. The region of applicability of the model of a semiinfinite body in ignition problems with counterflow nonstationary filtration of gases is determined. Kluwer Academic/Plenum Publishers, 2000 Combustion, Explosion and Shock Waves Springer US 36/4(2000-07-01), 442-451 0010-5082 36:4<442 2000 36 10573 https://doi.org/10.1007/BF02699474 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02699474 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Seplyarskii B. Institute of Structural Macrokinetics and Problems of Materials Science, Russian Academy of Sciences, 142432, Chernogolovka aut NATIONALLICENCE 773 0- Combustion, Explosion and Shock Waves Springer US 36/4(2000-07-01), 442-451 0010-5082 36:4<442 2000 36 10573 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer