Transient Plasma Ignition of Quiescent and Flowing Air/Fuel Mixtures
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Authors
Wang, Fei
Liu, J.B.
Sinibaldi, J.
Brophy, C.
Kuthi, A.
Jiang,, C.
Ronney, P.
Gundersen, Martin A.
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2005-04
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Abstract
Transient plasmas that exist during the formative phase of a pulse-ignited atmospheric pressure discharge were studied for application to ignition of quiescent and flowing fuel-air mixtures. Quiescent methane–air mixture ignition was studied as a function of equivalence ratio, and flowing ethane–air mixture was studied in a pulse detonation engine (PDE). The transient plasma was primarily comprised of streamers, which exist during approximately 50 ns prior to the formation of an equilibrated electron energy distribution. Results of significant reduction in delay to ignition and ignition pressure rise time were obtained with energy costs roughly comparable to traditional spark ignition methods (100–800 mJ). Reduction in delay to ignition by factors of typically 3 in quiescent mixes to 4 in a flowing PDE (0.35 kg/s), and other enhancements in performance were obtained. These results, along with a discussion of a pseudospark-based pulse generator that was developed for these applications, will be presented.
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Report
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Naval Postgraduate School (U.S.)
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.