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Type: Conference paper
Title: Structure of ethylene based nonpremixed flames stabilised on a JHC burner
Author: Medwell, P.
Kalt, P.
Dally, B.
Citation: Proceedings of the 6th Asia-Pacific Conference on Combustion (ASPACC), 20-23 May 2007
Publisher: The Combustion Institute
Publisher Place: CDROM
Issue Date: 2007
Conference Name: Asia-Pacific Conference on Combustion (6th : 2007 : Nagoya, Japan)
Editor: Akira Umemura
Statement of
Paul R. Medwell, Peter A. M. Kalt and Bassam B. Dally
Abstract: The spatial distribution of OH, formaldehyde (H2CO) and temperature imaged by laser diagnostic techniques are presented using the Jet in Hot Coflow (JHC) burner. The measurements are of nonpremixed ethylene jet flames with various diluents in a hot and highly diluted coflow. These conditions emulate those of Moderate or Intense Low Oxygen Dilution (MILD) combustion. With a 3% O2 coflow a faint outline is seen to extend to the jet exit plane, whereas the higher 9% O2 flames visually appear lifted. In flames which appear lifted, a continuous OH surface has been identified which extends to the jet exit. Nevertheless, at the “lift-off” height a transition from weak to strong OH is observed. H2CO is also observed to exist upstream of the transition point, further evidence of a pre-ignition reaction taking place in the “lifted” flames.
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Appears in Collections:Aurora harvest 6
Environment Institute publications
Mechanical Engineering conference papers

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