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Critical phenomena in the combustion of condensed substances

Critical phenomena in the combustion of condensed substances G. V. Melik-Gaikazov UDC 536.6+662.012 It is suggested that the burning surface of condensed substances in nonstationary combustion be considered as a one-dimensional disordered system of hot spots. The properties of such systems can be described in terms of percolation theory. Vari- ations in the electrical conductivity of the condensed-phase reaction of pure and modified ammonium perchlorate are analyzed for the case of oscillatory combustion. A method is proposed for calculating the burning rate under fast depressurization from data on electrical conductivity. It is shown that under critical conditions a universal dependence of critical parameters on adiabatic burning rate is ob- served. Experience on the combustion of condensed substances capable of self-sustaining combus- tion indicates that in some cases the combustion can occur in the oscillatory local spot re- gime [i]. This regime is typically realized in combustion under critical conditions, when, in particular, extenction is possible. Among these conditions are the following: the com- bustion of a sample of critical diameter, the transition of the combustion wave through the contact surface of two propellants [2], combustion under fast depressurization [3], etc. For pure ammonium perchlorate (AP) at p ~ 5 MPa and at the initial temperature T o http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Combustion, Explosion, and Shock Waves Springer Journals

Critical phenomena in the combustion of condensed substances

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References (2)

Publisher
Springer Journals
Copyright
Copyright
Subject
Physics; Classical Mechanics; Classical and Continuum Physics; Physical Chemistry; Vibration, Dynamical Systems, Control; Engineering, general
ISSN
0010-5082
eISSN
1573-8345
DOI
10.1007/BF00755318
Publisher site
See Article on Publisher Site

Abstract

G. V. Melik-Gaikazov UDC 536.6+662.012 It is suggested that the burning surface of condensed substances in nonstationary combustion be considered as a one-dimensional disordered system of hot spots. The properties of such systems can be described in terms of percolation theory. Vari- ations in the electrical conductivity of the condensed-phase reaction of pure and modified ammonium perchlorate are analyzed for the case of oscillatory combustion. A method is proposed for calculating the burning rate under fast depressurization from data on electrical conductivity. It is shown that under critical conditions a universal dependence of critical parameters on adiabatic burning rate is ob- served. Experience on the combustion of condensed substances capable of self-sustaining combus- tion indicates that in some cases the combustion can occur in the oscillatory local spot re- gime [i]. This regime is typically realized in combustion under critical conditions, when, in particular, extenction is possible. Among these conditions are the following: the com- bustion of a sample of critical diameter, the transition of the combustion wave through the contact surface of two propellants [2], combustion under fast depressurization [3], etc. For pure ammonium perchlorate (AP) at p ~ 5 MPa and at the initial temperature T o

Journal

Combustion, Explosion, and Shock WavesSpringer Journals

Published: Nov 22, 2004

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