Extinction Conditions Of Low-Speed, Ballistic Bluff-Body Stabilized Flames

Abstract

Flame extinction analysis of lean, premixed propane-air flames is conducted using a ballistic bluff-body flameholder. Lean blow out (LBO) was captured by decreasing the equivalence ratio of combustion until total extinction occurs. The transient phenomena leading to and resulting in flame extinction are captured using simultaneous high-speed particle imaging velocimetry (PIV) and broadband chemiluminescence. The stages preceding extinction were characterized qualitatively and, once identified, the driving mechanisms of the transitions were determined utilizing the experimental results. Quantitative analysis includes time-resolved extrapolation of the flow-field properties, including flame and hydrodynamic strain rates. Combined, these mechanisms further describe flame extinction dynamics.

Publication Date

1-1-2017

Publication Title

53rd AIAA/SAE/ASEE Joint Propulsion Conference, 2017

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.2514/6.2017-4775

Socpus ID

85088056512 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85088056512

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