학술논문
헬름홀츠 솔버 기반의 3차원 열음향해석을 통한 발전용 단일 캔 연소기에서의 공진 모드 분석
Resonance Mode Anlaysis in a Single Can-type Combustor through 3D Thermo-acoustic Analysis based on Helmholtz Solver
Resonance Mode Anlaysis in a Single Can-type Combustor through 3D Thermo-acoustic Analysis based on Helmholtz Solver
Document Type
Article
Author
Source
한국분무공학회지 / JOURNAL OF ILASS-KOREA. Mar 31, 2024 29(1):23
Subject
Language
Korean
ISSN
1226-2277
Abstract
This study conducted a 3D thermo-acoustic analysis based on the helmholtz solver to analyze the major resonance modes causing combustion instability in a single-can combustor. The experimental investigations were carried out on a test rig designed by the Korea Institute of Machinery & Materials (KIMM) under various conditions of hydrogen co-firing and fuel staging. Through these experiments, two primary unstable frequencies were identified. To determine the resonance modes of these frequencies, a 3D thermo-acoustic analysis was conducted using temperature information from the test rig. The results confirmed that the unstable frequencies observed in the experiments were all longitudinal modes. Additionally, the mode shapes identified in the analysis facilitated a simplification of the exit geometry for the low-order network model, confirming that this did not significantly affect the fundamental resonance modes.