Title

Lewis Number Effects On The Extinction Of Counterflow Diffusion Flames

Abstract

An experimental study of the extinction limits of methane-air and propane-air counterflow diffusion flames is presented. Diffusive-thermal properties (i.e. Lewis numbers) are systematically varied by diluting the fuel stream with helium or argon. For the same level of dilution, the extinction strain rate is considerably lower for the He-diluted flames than for the Ardiluted flames over the entire range of dilutions tested. The observed experimental results are successfully explained by considering a weighted Lewis number of the counterflow flames as they approach the extinction limit. The flames investigated are also modeled using the OPPDIF code from the CHEMKIN package considering multicomponent transport properties. Experimental extinction results are in very good agreement with calculated extinction strain rates based on the detailed chemical kinetic models of the flames studied.

Publication Date

1-1-2005

Publication Title

Chemical and Physical Processes of Combustion - 2005 Technical Meeting of the Eastern States Section of the Combustion Institute

Number of Pages

38-41

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

84946215808 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84946215808

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