Title

Effects Of Dilution On Blowout Limits Of Turbulent Jet Flames

Keywords

Blowout limits; Blowout velocity; Inert dilution; Jet flames

Abstract

An extended database on blowout velocities of inert-diluted methane, propane, and hydrogen jet flames in the turbulent regime was experimentally established and used to examine and verify existing theories of blowout velocity estimation. Helium, argon, nitrogen, and carbon dioxide were used as the inert diluents to generate different initial properties at the jet exit. The theories of blowout velocity estimation by Kalghatgi (Combust. Sci. Technol., vol. 26, pp. 233-239, 1981) and Broadwell et al. (Proc. Combust. Instit., vol. 20, pp. 303-310, 1984) in the highly diluted regime were carefully examined using jet flames of different fuels diluted with inerts of different gas properties. The results showed that among the theories the blowout velocity estimation of Kalghatgi is more reliable in the extended region. On the other hand, the blowout velocity estimation of Broadwell et al. can do as well after proper modification by including the Reynolds number effect Ref. Based on the experimental results, modifications to the theories are proposed to accommodate for the deviation when they are used in the diluted regime. In addition, different from laminar jet flames, diffusive properties in terms of mass and thermal diffusivities are not the dominant parameters of blowout velocity in turbulent jet flames.

Publication Date

10-1-2004

Publication Title

Combustion Science and Technology

Volume

176

Issue

10

Number of Pages

1735-1753

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1080/00102200490487580

Socpus ID

4644247776 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/4644247776

This document is currently not available here.

Share

COinS