Flame Stabilization Mode Classification and Prediction in an Ethylene-Fueled Supersonic Combustor Model

Hyung-suk Lee; Inyoung Yang; Sang-hoon Lee

doi:10.15231/jksc.2024.29.4.090

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2024 Vol.29, Issue 4 Preview Page Next Page

Research Article

Flame Stabilization Mode Classification and Prediction in an Ethylene-Fueled Supersonic Combustor Model 에틸렌 연료 초음속 연소기 모델에서 화염 안정 모드의 분류 및 예측

31 December 2024. pp. 90-98

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Abstract

Combustion tests were performed on an ethylene-fueled supersonic combustor model under the combustor inlet flow speed condition of Mach 2.0, at three fuel equivalence ratio values. There was no ignition at fuel equivalence ratio of 0.06, and ignition and flame holding were possible at 0.13 and 0.20. Flame images were obtained using CH radical chemiluminescence, and the flame stabilization modes werer analyzed based on the flame images. At 0.13, the flame was locked at the cavity shear layer-stabilized mode. At 0.20, it started with the same mode immediately after ignition, but moved to the cavity-stabilized mode and then the jet wake-stabilized mode within a short period of time, and then went back and forth between those two modes. The flame stabilization modes at 0.20 were also analyzed using K-means++ clustering. The cavity shear layer-stabilized mode was the most stable, with the transtion probability to the cavity- stabilized mode of 1.5% and that to the jet wake-stabilized mode of 10.4%. The transition probability from jet wake-stabilized mode to cavity-stabilized mode was 8.4%.

Keywords

Supersonic combustor

Flame stabilization mode

Scramjet engine

K-means++ clustering algorithm

Markov chain

Chemiluminescence

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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 : 29
No :4
Pages :90-98
Received Date : 2024-10-22
Revised Date : 2024-12-10
Accepted Date : 2024-12-10
DOI :https://doi.org/10.15231/jksc.2024.29.4.090

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

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