Transfer functions of laminar premixed flames subjected to forcing by acoustic waves, AC electric fields, and non-thermal plasma discharges

Deanna Lacoste, Yuan Xiong, Jonas P. Moeck, Suk Ho Chung, William L. Roberts, Min Suk Cha

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

The responses of laminar CH4-air flames to forcing by acoustic waves AC electric fields and nanosecond repetitively pulsed glow discharges were investigated. Conical M-shaped and V-shaped flames were considered. For forcing by acoustic waves and plasma the geometry of the flame plays a major role in the response of the combustion while the flame shape did not affect the response of the combustion to electric field forcing. The flame response to acoustic forcing of about 10% of the incoming flow was similar to those previously obtained. The flames were responsive to an AC electric field across the whole range of frequencies. The gain of the transfer function obtained for plasma forcing was up to 5 times higher than for acoustic forcing. A forcing mechanism based on the generation of ionic wind is proposed along with a possible mechanism of plasma forcing.

Original languageEnglish (US)
Pages (from-to)4183-4192
Number of pages10
JournalProceedings of the Combustion Institute
Volume36
Issue number3
DOIs
StatePublished - 2017

Keywords

  • Combustion dynamics
  • Nanosecond repetitively pulsed discharges
  • Plasma-assisted combustion
  • Thermoacoustic instabilities

ASJC Scopus subject areas

  • General Chemical Engineering
  • Mechanical Engineering
  • Physical and Theoretical Chemistry

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