Subatmospheric extinction of opposed jet diffusion flames of jet fuel and its surrogates

Document Type

Conference Proceeding

Publication Date

1-1-2009

Abstract

In this experimental study, the pressure dependence of the extinction strain rate of flames of jet fuel and other hydrocarbons was measured and quantified. Laminar non- premixed opposed jet flames of fuel/nitrogen mixtures versus oxygen-enriched air were progressively strained to extinction by lowering pressure over the pressure range 0.1 to 0.68 atm. The fuels investigated were methane, ethylene, jet-A, n-decane, 1,2,4-trimethyl benzene, and blends of n-decane and 1,2,4-trimethyl benzene. All liquid fuels were vaporized and diluted to a mass fraction of 21.5% in nitrogen gas; the gaseous fuels were not diluted. The oxidizer was a 50-50% molar mixture of oxygen and nitrogen. The global strain rate at extinction was seen to monotonically increase with pressure in the sub-atmospheric pressure range explored. Overall reaction orders calculated from density-weighted extinction strain rates were between 1.3 and 2.0. Jet-A flames were extinguished at conditions similar to those for the decane/trimethyl benzene blends, indicating that these blends can serve as a surrogate for Jet-A. Copyright © 2009 by Srinivasan, Park, Fisher, Gouldin, and Bozzelli.

Identifier

78549260751 (Scopus)

ISBN

[9781563479694]

Publication Title

47th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

External Full Text Location

https://doi.org/10.2514/6.2009-1182

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