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Proceedings Paper

Imaging strategies for the study of gas turbine spark ignition
Author(s): James R. Gord; Charles Tyler; Keith D. Grinstead Jr.; Gregory J. Fiechtner; Michael J. Cochran; John R. Frus
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Paper Abstract

Spark-ignition systems play a critical role in the performance of essentially all gas turbine engines. These devices are responsible for initiating the combustion process that sustains engine operation. Demanding applications such as cold start and high-altitude relight require continued enhancement of ignition systems. To characterize advanced ignition systems, we have developed a number of laser-based diagnostic techniques configured for ultrafast imaging of spark parameters including emission, density, temperature, and species concentration. These diagnostics have been designed to exploit an ultrafast- framing charge-coupled-device (CCD) camera and high- repetition-rate laser sources including mode-locked Ti:sapphire oscillators and regenerative amplifiers. Spontaneous-emission and laser-shlieren measurements have been accomplished with this instrumentation and the result applied to the study of a novel Unison Industries spark igniter that shows great promise for improved cold-start and high-altitude-relight capability as compared to that of igniters currently in use throughout military and commercial fleets. Phase-locked and ultrafast real-time imaging strategies are explored, and details of the imaging instrumentation, particularly the CCD camera and laser sources, are discussed.

Paper Details

Date Published: 13 October 1999
PDF: 10 pages
Proc. SPIE 3783, Optical Diagnostics for Fluids/Heat/Combustion and Photomechanics for Solids, (13 October 1999); doi: 10.1117/12.365756
Show Author Affiliations
James R. Gord, Air Force Research Lab. (United States)
Charles Tyler, Air Force Research Lab. (United States)
Keith D. Grinstead Jr., Innovative Scientific Solutions, Inc. (United States)
Gregory J. Fiechtner, Innovative Scientific Solutions, Inc. (United States)
Michael J. Cochran, Unison Industries (United States)
John R. Frus, Unison Industries (United States)

Published in SPIE Proceedings Vol. 3783:
Optical Diagnostics for Fluids/Heat/Combustion and Photomechanics for Solids
Soyoung Stephen Cha; Peter John Bryanston-Cross; Carolyn R. Mercer, Editor(s)

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