Radiation effect on thermal explosion in a gas containing evaporating fuel droplets

The dynamics of thermal explosion in a fuel droplets/hot air mixture is investigated using the geometrical version of the method of integral manifolds. The results are applied to the modelling of the ignition process in diesel engines. Effects of the thermal radiation, semi-transparency of droplets...

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Veröffentlicht in:	International journal of thermal sciences 2007-04, Vol.46 (4), p.358-370
Hauptverfasser:	Goldfarb, I., Gol'dshtein, V., Katz, D., Sazhin, S.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Combustion Combustion. Flame Diesel fuel Energy Energy. Thermal use of fuels Exact sciences and technology Theoretical studies Theoretical studies. Data and constants. Metering Thermal explosion Thermal radiation
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container_end_page	370
container_issue	4
container_start_page	358
container_title	International journal of thermal sciences
container_volume	46
creator	Goldfarb, I. Gol'dshtein, V. Katz, D. Sazhin, S.
description	The dynamics of thermal explosion in a fuel droplets/hot air mixture is investigated using the geometrical version of the method of integral manifolds. The results are applied to the modelling of the ignition process in diesel engines. Effects of the thermal radiation, semi-transparency of droplets and oxidizer are taken into account. In contrast to the previous studies, the difference between gas temperature (responsible for convective heating of droplets) and external temperature (responsible for radiative heating of droplets) is taken into account. The dynamics of the explosion is presented in terms of the dynamics of a multi-scale, singularly perturbed system. The relevant parametric regions of this system are analyzed. Explicit analytical formulae for the ignition delay in the presence of thermal radiation are derived. It is shown that the effect of thermal radiation can lead to considerable reduction (up to about 30%) of the total ignition delay time.
doi_str_mv	10.1016/j.ijthermalsci.2006.06.014
format	Article
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source	ScienceDirect Journals (5 years ago - present)
subjects	Applied sciences Combustion Combustion. Flame Diesel fuel Energy Energy. Thermal use of fuels Exact sciences and technology Theoretical studies Theoretical studies. Data and constants. Metering Thermal explosion Thermal radiation
title	Radiation effect on thermal explosion in a gas containing evaporating fuel droplets
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