Experimental Investigation of Self-excited Low-swirl Flame Dynamics with Different Blockage Ratios

Jaheon Gu; Kihun Moon; Hyunwook Jegal; Kyu Tae Kim

doi:10.15231/jksc.2022.27.2.046

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2022 Vol.27, Issue 2 Preview Page

Research Article

Experimental Investigation of Self-excited Low-swirl Flame Dynamics with Different Blockage Ratios 막힘률에 따른 저선회 화염 동역학에 대한 실험적 연구

30 June 2022. pp. 46-53

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Abstract

The influence of the blockage ratio on low-swirl flame dynamics was experimentally investigated in a lean-premixed combustor. Here we test five different swirl injectors, one with high swirl and four with low swirl, all with different blockage ratios (β). We analyze a large experimental dataset of self-excited instability measurements, and show that instability amplitudes for the case of β = 0.75 tend to be remarkably attenuated. This is attributed to the development of out-of-phase modulations between the jet-stabilized flame in the inner section and the swirl-stabilized flame in the outer section.

Keywords

Blockage ratio

Combustion instability

Low-swirl injector

Gas turbine combustor

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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 : 27
No :2
Pages :46-53
Received Date : 2022-04-10
Revised Date : 2022-04-24
Accepted Date : 2022-06-09
DOI :https://doi.org/10.15231/jksc.2022.27.2.046

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

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