Laminar jet diffusion flame under AC electric fields

Yuan Xiong, Suk Ho Chung, Min Suk Cha*

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

Abstract

The effects of AC electric fields on a laminar jet diffusion flame in a coflow burner have been experimentally investigated. A fuel nozzle made by stainless steel has been used as an electrode to generate AC electric fields in a flame zone. As results, reduction in soot luminosity together with two distinctive instabilities, i. e., a tip flickering behavior and the rotational motion of a flame, has been found. When we increased either an applied voltage or an applied AC frequency, we could observe sudden reduction in the area of a sooting zone as well as drop in the soot luminosity which implies less soot formation. For further increasing frequency, the flame flickering behavior, through FFT analysis, could be identified to has the frequency around 12Hz, which is similar to a buoyancy driven Kelvin-Helmholtz (K-H) instability. In addition, a new flame behavior, the rotational motion of a flame, has been found in a high frequency (3 kHz) and high voltage (4 kV) condition. The characteristic frequency of this rotational motion is around 15 Hz. Detailed characteristics for aforementioned electrically triggered flame modifications are discussed.

Original languageEnglish (US)
StatePublished - Jan 1 2013
Event9th Asia-Pacific Conference on Combustion, ASPACC 2013 - Gyeongju, Korea, Republic of
Duration: May 19 2013May 22 2013

Other

Other9th Asia-Pacific Conference on Combustion, ASPACC 2013
CountryKorea, Republic of
CityGyeongju
Period05/19/1305/22/13

ASJC Scopus subject areas

  • Environmental Engineering

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