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The influence of molecular properties of gases on heat and mass transfer during combustion of mixed and unmixed reagents

Authors
  • Boyarshinov, B. F.1
  • 1 Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia , Novosibirsk (Russia)
Type
Published Article
Journal
Thermophysics and Aeromechanics
Publisher
Kutateladze Institute of Thermophysics SB RAS
Publication Date
Jan 01, 2021
Volume
28
Issue
1
Pages
115–124
Identifiers
DOI: 10.1134/S086986432101011X
Source
Springer Nature
Keywords
License
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Abstract

Based on the known calculated and experimental data on distribution of temperature and gas compositions near the flame front in jets, it is shown that the nature of a change in the total enthalpy during combustion of mixed and unmixed reagents depends on the molecular properties of gases to different extents, but in the same way. Systems with Lewis numbers less than one have a maximum in the enthalpy profile; if the Lewis number is greater than one, a minimum appears near the flame front. Data on heat fluxes associated with thermal conductivity and diffusion are obtained. It has been found that during combustion of unmixed reagents, the heat flux carried by diffusion is an order of magnitude less than the flux carried by thermal conductivity. For mixed reagents, the heat fluxes carried by diffusion and thermal conductivity exceed the heat fluxes in the flame of unmixed reagents.

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