CUED Publications database

Tomographic reconstruction of OH* chemiluminescence in two interacting turbulent flames

Worth, NA and Dawson, JR (2013) Tomographic reconstruction of OH* chemiluminescence in two interacting turbulent flames. Measurement Science and Technology, 24. ISSN 0957-0233

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Abstract

The tomographic reconstruction of OH* chemiluminescence was performed on two interacting turbulent premixed bluff-body stabilized flames under steady flow conditions and acoustic excitation. These measurements elucidate the complex three-dimensional (3D) vortex-flame interactions which have previously not been accessible. The experiment was performed using a single camera and intensifier, with multiple views acquired by repositioning the camera, permitting calculation of the mean and phase-averaged volumetric OH* distributions. The reconstructed flame structure and phase-averaged dynamics are compared with OH planar laser-induced fluorescence and flame surface density measurements for the first time. The volumetric data revealed that the large-scale vortex-flame structures formed along the shear layers of each flame collide when the two flames meet, resulting in complex 3D flame structures in between the two flames. With a fairly simple experimental setup, it is shown that the tomographic reconstruction of OH* chemiluminescence in forced flames is a powerful tool that can yield important physical insights into large-scale 3D flame dynamics that are important in combustion instability. © 2013 IOP Publishing Ltd.

Item Type: Article
Uncontrolled Keywords: tomographic reconstruction turbulent flames vortexflame interactions
Subjects: UNSPECIFIED
Divisions: Div A > Fluid Mechanics
Div A > Energy
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:44
Last Modified: 16 Dec 2014 19:06
DOI: 10.1088/0957-0233/24/2/024013