Timmerman, B. H. (Brenda H.) and Bryanston-Cross, P. (2007) Optical investigation of heat release and NOx production in combustion. In: 3rd International Conference on Optical and Laser Diagnostics, City Univ London, London, UK, 22-25 May 2007. Published in: 3rd International Conference on Optical and Laser Diagnostics (ICOLAD 2007), Volume 85 U58-U64. ISSN 1742-6588. doi:10.1088/1742-6596/85/1/012007

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Abstract

Two novel optical techniques are presented for non-intrusive, spatially resolved study of combustion, both based on passive Optical Emission Tomography (OET). Firstly, OET is used for non-intrusive study of heat release through the detection of chemiluminescence by the hydroxyl radical that is generated in the burning process. The OET technique presented here is based on a passive fibre-optic detection system, which allows spatially resolved high-frequency detection of the flame front in a combustion flame, where all fibres detect the emission signals simultaneously. The system withstands the high pressures and temperatures typically encountered in the harsh environments of gas turbine combustors and IC engines. The sensor-array is non-intrusive, low-cost, compact, simple to configure and can be quickly set up around a combustion field. The maximum acquisition rate is 2 kHz. This allows spatially resolved study of the fast phenomena in combustion. Furthermore, a method is presented for study of the production of NOx through chemiluminescence from tri-methyl-borate (TMB). In combustion, the tri-methyl-borate produces green luminescence in locations where NOx would be produced. Combining the green luminescence visualisation with UV detection of the hydroxyl radical allows monitoring of heat release and of NOx production areas, thus giving a means of studying both the burning process and the resulting NOx pollution.

Item Type:	Conference Item (Paper)
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science > Engineering
Series Name:	JOURNAL OF PHYSICS CONFERENCE SERIES
Journal or Publication Title:	3rd International Conference on Optical and Laser Diagnostics (ICOLAD 2007)
Publisher:	IOP Publishing
ISSN:	1742-6588
Editor:	Arcoumanis, C and Grattan, KTV
Official Date:	2007
Dates:	Date Event 2007 Published
Volume:	Volume 85
Number of Pages:	7
Page Range:	U58-U64
DOI:	10.1088/1742-6596/85/1/012007
Status:	Peer Reviewed
Publication Status:	Published
Conference Paper Type:	Paper
Title of Event:	3rd International Conference on Optical and Laser Diagnostics
Type of Event:	Conference
Location of Event:	City Univ London, London, UK
Date(s) of Event:	22-25 May 2007

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