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2025 Vol.30, Issue 2 Preview Page

Research Article

The Effect of Electric Field on Thermo-Acoustic Instability in a Laminar Premixed Flame

전기장 인가에 따른 층류 예혼합 화염의 열-음향 불안정성 변화

Taehun Kim1
,
Hyemin Kim1†
김 태훈1
,
김 혜민1†
1Department of Aeronautical & Mechanical Design Engineering, Korea National University of Transportation
1국립한국교통대학교 항공․기계설계학과
*Corresponding Author
30 June 2025. pp. 11-18
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Abstract

In this study, the effect of an electric field on thermo-acoustic instability in a laminar premixed flame was investigated. Flame surface fluctuations and sound pressure were measured using a high-speed camera and a microphone. The results showed that the flame surface oscillated under the no-voltage condition, with these oscillations intensifying under –3 kV and decreasing under +3 kV. This behavior remained consistent even as the inlet velocity increased. In the frequency domain, applying –3 kV shifted the dominant frequency to a higher range, whereas no distinct peak was observed under the +3 kV condition. Regarding the sound pressure level, –3 kV had little impact, whereas +3 kV reduced it by up to 23.8% under stoichiometric conditions. Furthermore, this effect remained effective even under lean premixed conditions.

Keywords
Laminar premixed flame
Flame surface area
Thermo-acoustic instability
Ionic wind effect
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Information
  • Publisher :The Korean Society of Combustion
  • Publisher(Ko) :한국연소학회
  • Journal Title :Journal of the Korean Society of Combustion
  • Journal Title(Ko) :한국연소학회지
  • Volume : 30
  • No :2
  • Pages :11-18
  • Received Date : 2025-03-07
  • Revised Date : 2025-04-17
  • Accepted Date : 2025-05-06
  • DOI :https://doi.org/10.15231/jksc.2025.30.2.011
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