Response of spherical diffusion flames under rotation with general Lewis numbers

Document Type

Article

Publication Date

5-1-2005

Abstract

The structure and extinction of diffusion flames generated by a porous spherical burner or a fuel droplet in response to rotational motion were investigated through perturbation analysis, with emphasis on the effects of non-unity Lewis numbers (Le) for both fuel and oxidizer. The analysis shows that the rotational motion induces a secondary flow that distorts the otherwise spherical flame into a pancake shape. The flame temperature is also affected, such that the flame becomes more susceptible to extinction either at the poles or the equator, depending on the combined effects of Lewis numbers, flame stretch through local flow non-uniformity and ambient oxidizer concentration. The results reported here will help guide planned microgravity experiments. © 2005 Taylor & Francis Group Ltd.

Identifier

24144499393 (Scopus)

Publication Title

Combustion Theory and Modelling

External Full Text Location

https://doi.org/10.1080/13647830500098423

ISSN

13647830

First Page

199

Last Page

217

Issue

2

Volume

9

Fund Ref

National Aeronautics and Space Administration

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