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2020 Vol.25, Issue 2

Research Article

Study on Flame Structure and Combustion Instability in a Swirl-Stabilized Combustor

스월-안정화 연소기에서 화염구조와 연소불안정에 대한 연구

Donghyun Hwang1
Sujin Bak1
Kyubok Ahn1*
황 동현1
박 수진1
안 규복1*
1School of Mechanical Engineering, Chungbuk National University
1충북대학교 기계공학부
* Corresponding Author
June 2020. pp. 1-10
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Abstract

Flame structure and combustion instability characteristics in a swirl-stabilized combustor were investigated by changing fuel, inlet mean velocity, equivalence ratio, and swirler geometry. Two different premixed gases consisting of air and hydrocarbon fuels (C2H4, CH4) were supplied to a combustion chamber through an inlet section and an axial swirler. Dynamic pressure transducer and ICCD camera with a bandpass filter were used to measure pressure fluctuations and flame structures, respectively. The experimental results showed that the pressure fluctuations significantly increased, accompanied by the flame structure transition under certain conditions. Hollow cone flames were mainly formed under stable combustion, but heat release was distributed near the central axis of the combustion chamber under the combustion instability.

Keywords
Combustion instability
Flame structure
Heat release pattern
Turbulent lean premixed flame
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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 : 25
  • No :2
  • Pages :1-10
  • Received Date :2019. 10. 14
  • Revised Date :2019. 10. 31
  • Accepted Date : 2019. 11. 07
  • DOI :https://doi.org/10.15231/jksc.2020.25.2.001
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