Lean burn limit and time to light characteristics of laser ignition in gas turbines

Griffiths, Jonathan, Riley, Mike, Kirk, Antony, Borman, Alexander, Lawrence, Jonathan and Dowding, Colin (2014) Lean burn limit and time to light characteristics of laser ignition in gas turbines. Optics and Lasers in Engineering, 55. pp. 262-266. ISSN 0143-8166

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Abstract

This work details a study of laser ignition in a low pressure combustion test rig, representative of an industrial gas turbine (SGT-400, Siemens Industrial Turbomachinery Ltd.) and for the first time investigates the effect of air mass flow rate on combustion characteristics at air/fuel ratios at the lean burn limit. Both the lean burn limit and time taken to light are essential in determining the suitability of a specified air/fuel ratio, especially in multi-chamber ignition applications. Through extension of the lean burn limit and reduction of the time taken to light, the operating window for ignition with regards to the air/fuel ratio can be increased, leading to greater reliability and repeatability of ignition. Ignition of a natural gas and air mixture at atmospheric pressure was conducted using both a standard high energy igniter and a laser ignition system utilizing a Q-switched Nd:YAG laser source operating at 1064 nm wavelength. A detailed comparison of the lean burn limit and time taken to light for standard ignition and laser ignition is presented.

Item Type:	Article
Faculty \ School:
Depositing User:	LivePure Connector
Date Deposited:	09 Feb 2022 09:30
Last Modified:	23 Oct 2022 03:31
URI:	https://ueaeprints.uea.ac.uk/id/eprint/83364
DOI:	10.1016/j.optlaseng.2013.11.016

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