Turbulent, Low-Speed, Ballistic Bluff-Body Stabilized Flame Extinction Conditions

Abstract

A ballistic bluff-body flameholder is utilized to stabilize turbulent, premixed propane-air flames in order to study flame extinction dynamics. Turbulent conditions will be studied within the flamelet and corrugated reaction regimes, as described in the Borghi Diagram. These are critical to the experiment to accurately replicate real life conditions. Simultaneous high-speed particle imaging velocimetry (PIV) and chemiluminescence will be used to define the flame conditions and analyze extinction phenomena. Strain rate, vorticity, turbulence, and overall flame structure will be extrapolated from these images. Further analysis will outline the extinction conditions experienced within these regimes in order to accurately model lean blowout. These results focused on the strain rate along the flame within the reacting flame edge as the flame approached extinction. Nearing extinction, oscillating and increased strain rates appeared within the reattachment region, driving blow off.

Publication Date

1-1-2018

Publication Title

AIAA Aerospace Sciences Meeting, 2018

Issue

210059

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.2514/6.2018-0152

Socpus ID

85044345202 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85044345202

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