Combustion Instability Characteristics according to Swirl Number and Combustion Chamber Length in a Gas Turbine Combustor

Sunwoo Han; Shinwoo Lee; Donghyun Hwang; Kyubok Ahn

doi:10.15231/jksc.2023.28.1.009

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2023 Vol.28, Issue 1 Preview Page Next Page

Research Article

Combustion Instability Characteristics according to Swirl Number and Combustion Chamber Length in a Gas Turbine Combustor 가스터빈 연소기에서 스월 수와 연소실 길이에 따른 연소불안정 특성

31 March 2023. pp. 9-16

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Abstract

Combustion instability characteristics were investigated through combustion tests using ethylene and air in a model gas turbine combustor. At various flow conditions, the swirl number and combustion chamber length were changed independently. Dynamic pressure transducer and photomultiplier tube with a bandpass filter were used to measure pressure oscillations and heat release fluctuations. Analysis of phase difference and flame structure showed that the unstable mode had resonant frequencies of the combustion chamber and the inlet mixing section. When the swirl number increased, it was confirmed that the instability mode corresponding to the resonance frequency of the inlet mixing section disappeared. In addition, resonance mode analysis was performed using the OSCILOS code and compared with the experimental results.

Keywords

Gas turbine

Combustion instability

Turbulent lean premixed flame

Swirl number

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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 : 28
No :1
Pages :9-16
Received Date : 2022-11-08
Revised Date : 2022-12-17
Accepted Date : 2022-12-28
DOI :https://doi.org/10.15231/jksc.2023.28.1.009

Journal of The Korean Society Combustion ISSN:1226-0959(Print) 2466-2089(Online) 한국연소학회지

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