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Heat Transfer Research
Fator do impacto: 0.404 FI de cinco anos: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Imprimir: 1064-2285
ISSN On-line: 2162-6561

Volumes:
Volume 50, 2019 Volume 49, 2018 Volume 48, 2017 Volume 47, 2016 Volume 46, 2015 Volume 45, 2014 Volume 44, 2013 Volume 43, 2012 Volume 42, 2011 Volume 41, 2010 Volume 40, 2009 Volume 39, 2008 Volume 38, 2007 Volume 37, 2006 Volume 36, 2005 Volume 35, 2004 Volume 34, 2003 Volume 33, 2002 Volume 32, 2001 Volume 31, 2000 Volume 30, 1999 Volume 29, 1998 Volume 28, 1997

Heat Transfer Research

DOI: 10.1615/HeatTransRes.v38.i2.10
pages 95-106

Effect of the Microstructure of Heterogeneous Mixture on Regularities of Gas-Free Combustion

N. A. Kochetov
Institute of Structural Macrokinetics and Problems of Material Science, Russian Academy of Sciences, Chernogolovka, Moscow Region, Russian Federation
A. S. Rogachev
Institute of Structural Macrokinetics and Problems of Material Science, Russian Academy of Sciences, Chernogolovka, Moscow Region, Russian Federation
A. N. Emelianov
Institute of Structural Macrokinetics and Problems of Material Science, Russian Academy of Sciences, Chernogolovka, Moscow Region, Russian Federation
E. V. Illarionova
Institute of Structural Macrokinetics and Problems of Material Science, Russian Academy of Sciences, Chernogolovka, Moscow Region, Russian Federation
V. M. Shkiro
Institute of Structural Macrokinetics and Problems of Material Science, Russian Academy of Sciences, Chernogolovka, Moscow Region, Russian Federation

RESUMO

We performed a series of experiments on investigation of the microstructure of the initial charge for gas-free combustion, including investigation of compressibility, electroconductivity, thermal conductivity, rate of charge burning, as well as metallographic investigations. The determining role of the shape of particles and their capacity of formation of a continuous skeleton, as well as their impact on regularities of gas-free combustion have been identified. It has been shown that the velocity and mode of propagation of the gas-free combustion front are determined by the transfer of heat between metal particles in the initial reaction mixture, with the limiting role being played by contacts between particles. The method of atomic tunnel microscopy was used to study the micro relief of the surface of particles and determine the most probable width of micro gaps between the particles at the point of their contact. The presence of these gaps leads to a strong dependence of the mixture heat conduction on the gaseous atmosphere (vacuum, helium and air).


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