Radiative extinction of burner-supported spherical diffusion flames: A scaling analysis

A scaling analysis of burner-supported spherical-diffusion-flame extinction brought about by radiative heat loss is presented. The results are compared against earlier microgravity experimental data and unsteady numerical computations with detailed chemistry available in the literature, for normal a...

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Bibliographic Details
Published in:	Combustion and flame Vol. 205; pp. 368 - 370
Main Authors:	Nayagam, Vedha, Dietrich, Daniel L., Williams, Forman A.
Format:	Journal Article
Language:	English
Published:	New York Elsevier Inc 01-07-2019 Elsevier BV
Subjects:	Absorptivity Diffusion flames Extinction Extinguishing Flow velocity Gas flow Heat loss Inverse flames Microgravity Organic chemistry Radiative extinction Scaling Spherical diffusion flames Spherical diffusion flames Inverse flames Radiative extinction
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Summary:	A scaling analysis of burner-supported spherical-diffusion-flame extinction brought about by radiative heat loss is presented. The results are compared against earlier microgravity experimental data and unsteady numerical computations with detailed chemistry available in the literature, for normal and inverse flames. The flame diameter at extinction is shown to correlate well with the present model, in which the extinction radius scales with one-third power of gas flow rate times reactant mass fraction divided by the Planck-mean absorption coefficient.
ISSN:	0010-2180 1556-2921
DOI:	10.1016/j.combustflame.2019.04.027