Influence of Pairing Asymmetry on Thermoacoustic Instabilities in a Can-annular Combustor

被引：0
|
作者：
Bae, Dahyun [1 ]
Moon, Kihun [1 ]
Kim, Kyu Tae [1 ]
机构：
[1] Korea Adv Inst Sci & Technol, Dept Aerosp Engn, Daejeon, South Korea
来源：
JOURNAL OF THE KOREAN SOCIETY OF COMBUSTION | 2023年 / 28卷 / 01期
关键词：
Azimuthal instabilities; Can-annular combustor; Combustion instability; Cross-talk; Hydrogen; FLAME TRANSFER-FUNCTIONS; ACOUSTIC INTERACTIONS; SWIRL; MECHANISMS; MODES;
D O I：
10.15231/jksc.2023.28.1.040
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The influence of pairing asymmetry on thermoacoustic instabilities was experimentally investigated in an odd -numbered can -annular combustion system, using 3D FEM-based Helmholtz simulation and acoustic wave decomposition method. We show that a pair of degenerate mode is split into two modes with a frequency difference of 6 Hz, which is induced by a pairing -asymmetry -related geometrical property. Interestingly, the modal interaction between splitting modes gives rise to the periodic transition between standing and spinning azimuthal instabilities in the annular cross -talk section.
引用
收藏
页码：40 / 48
页数：9
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