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Ignition of combustible atmospheres caused by uniform and non-uniform radiation heating of an inert particle

journal contribution
posted on 06.12.2017, 00:00 by V Stamatov, K King, DK Zhang
A modelling study of the ignition and explosion behaviour of quiescent methane=air mixtures caused by a radiatively heated inert particle has been carried out. Selecting the particle size much larger (about 2000 times) than the radiation wavelength reduces interference from Mie scattering. However, this results in axial nonsymmetryof the processes of heat and mass transfer between, and within the particle and the surrounding gas phase. In order to simplify the model, the full number of space variables was reduced to one and a correlation factor between the cases of uniform and non-uniform radiative heating of the particle was established. The numerical simulations are compared with experimental results from previous studies. The theoretical predictions correlate well with the experimental values if the correlation factor is taken into account, however the absence of such a factor leads to significantly higher values (about 10 times) of the critical radiation power flux.

History

Volume

178

Issue

7

Start Page

1325

End Page

1344

Number of Pages

20

eISSN

1563-521X

ISSN

0010-2202

Location

United States

Publisher

Taylor & Francis Inc.

Language

en-aus

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Curtin University of Technology; Monash University; Not affiliated to a Research Institute; University of Adelaide;

Era Eligible

Yes

Journal

Combustion science and technology.

Usage metrics

CQUniversity

Categories

Exports