Experimental and numerical investigation of flame stability and burning velocity in a micro burner using infrared diagnostics

Veeraragavan, A., Leach, T. and Cadou, C. (2006). Experimental and numerical investigation of flame stability and burning velocity in a micro burner using infrared diagnostics. In: Collection of technical papers: 44th AIAA Aerospace Sciences Meeting. 44th AIAA Aerospace Sciences Meeting 2006, Reno, NV, United States, (16274-16284). 9 - 12 January 2007.

Author Veeraragavan, A.
Leach, T.
Cadou, C.
Title of paper Experimental and numerical investigation of flame stability and burning velocity in a micro burner using infrared diagnostics
Conference name 44th AIAA Aerospace Sciences Meeting 2006
Conference location Reno, NV, United States
Conference dates 9 - 12 January 2007
Proceedings title Collection of technical papers: 44th AIAA Aerospace Sciences Meeting
Journal name Collection of Technical Papers - 44th AIAA Aerospace Sciences Meeting
Place of Publication Reston, VA, United States
Publisher American Institute of Aeronautics and Astronautics
Publication Year 2006
Sub-type Fully published paper
ISBN 9781563478079
Volume 21
Start page 16274
End page 16284
Total pages 11
Language eng
Abstract/Summary The effect of heat recirculation on the stability of flames stabilized in micro-channels is investigated via experiment and numerical simulation. The experiments are performed on methane-air flames stabilized in a silicon-walled micro-channel with planar symmetry, channel height of 2.2 mm and a wall thickness of 0.5 mm. Measurements of the temperature profile across the channel are made at different axial locations using a non-intrusive infrared absorption technique while the temperature distribution along the outside surface of the channel is determined from infrared images of surface emissions. These measurements, when combined with a model for heat loss from the outside surface of the channel to the environment, enable the determination of the spatial distribution of the heat flux from the gas to the combustor structure and of the amount of heat recirculation that occurs between the post and pre-flame regions. The change in flame speed with equivalence ratio is measured and shown to be related to the degree of heat recirculation through the channel wall. Similar results are obtained using a numerical simulation of pre-mixed hydrogen combustion in the silicon-walled micro-channel. Taken together, the results show that increasing heat recirculation increases burning velocity and enhances flame stability in the microcombustor.
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Conference Paper
Collection: School of Mechanical & Mining Engineering Publications
 
Versions
Version Filter Type
Citation counts: Scopus Citation Count Cited 0 times in Scopus Article
Google Scholar Search Google Scholar
Created: Mon, 04 Jun 2012, 11:40:56 EST by Rose Clements on behalf of School of Mechanical and Mining Engineering