Plasma-enhanced combustion of a lean premixed air-propane turbulent flame using a nanosecond repetitively pulsed plasma

D. Galley*, G. Pilla, D. Lacoste, S. Ducruix, F. Lacas, D. Veynante, C. O. Laux

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

40 Scopus citations

Abstract

A Nanosecond Repetitively Pulsed Plasma (NRPP) generator capable of delivering an electric pulse of 10 kV during 10 ns at a frequency of up to 30 kHz has been used to stabilize and improve the efficiency of a 25 kW lean premixed propane/air flame at atmospheric pressure. We show that, when placed in the recirculation zone of the flame, the plasma significantly increases the heat release and the combustion efficiency, thus allowing to stabilize the flame under lean conditions where it would not exist without plasma. Stabilization is obtained with a very low level of plasma power of about 75 W, or 0.3 % of the maximum power of the flame. In addition, we find that at high flow rates, where the flame should normally extinguish, the NRPP allows the existence of an intermittent V-shaped flame with significant heat release, and at even higher flow rates the existence of a small dome-shaped flame confined near the electrodes that can serve as a pilot flame to reignite the combustor. Optical emission spectroscopy measurements are presented to determine the temperature of the plasma-enhanced flame and to identify the active species produced by the plasma, namely O, H and OH.

Original languageEnglish (US)
Title of host publication43rd AIAA Aerospace Sciences Meeting and Exhibit - Meeting Papers
Pages10519-10532
Number of pages14
StatePublished - 2005
Externally publishedYes
Event43rd AIAA Aerospace Sciences Meeting and Exhibit - Reno, NV, United States
Duration: Jan 10 2005Jan 13 2005

Other

Other43rd AIAA Aerospace Sciences Meeting and Exhibit
CountryUnited States
CityReno, NV
Period01/10/0501/13/05

ASJC Scopus subject areas

  • Engineering(all)

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