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

页码：40 / 48

页数：9

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