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2021 Vol.26, Issue 1 Preview Page

Research Article

Curvature Distribution of Lean-Premixed Mesoscale Multinozzle Hydrogen Flames

희박 예혼합 메조스케일 다중노즐 수소 화염의 곡률 분포

Taesong Lee1
,
Kyu Tae Kim1*
이 태송1
,
김 규태1*
1Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology
1한국과학기술원 항공우주공학과
*Corresponding Author
31 March 2021. pp. 14-21
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Abstract

Local structures of lean fully-premixed hydrogen-air flames in a mesoscale multinozzle array were studied in a tunable combustion test facility, using instantaneous OH PLIF measurements and subsequent image processing techniques. We observe that under thermoacoustically stable conditions, pure hydrogen flame ensemble takes on a conical structure and they are stabilized in isolation without strong flame-to-flame interactions. Under unstable conditions, however, marked flame front deformation and cusp formation occur due to high amplitude velocity fluctuations. Our curvature calculation results reveal that the probability density function distribution is characterized by a positive average value, meaning that the formation of convex contours is more pronounced in lean-premixed pure hydrogen combustion environment.

Keywords
Curvature
Hydrogen
Lean-premixed
Mesoscale multinozzle
OH PLIF
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Information
  • Publisher :The Korean Society Combustion
  • Publisher(Ko) :한국연소학회
  • Journal Title :Journal of The Korean Society Combustion
  • Journal Title(Ko) :한국연소학회지
  • Volume : 26
  • No :1
  • Pages :14-21
  • Received Date : 2020-11-02
  • Revised Date : 2020-12-14
  • Accepted Date : 2020-12-27
  • DOI :https://doi.org/10.15231/jksc.2021.26.1.014
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