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2025 Vol.30, Issue 2 Preview Page

Research Article

Acoustic Prediction and Analysis of Full-scale Can-annular Combustors Using Cross-talk Acoustic Boundary Condition

Cross-talk 음향 경계조건을 이용한 실스케일 Can-annular 연소기의 음향 특성 예측 및 분석

Junwoo Jung1
,
Myunggon Yoon1
,
Daesik Kim1†
정 준우1
,
윤 명곤1
,
김 대식1†
1Department of Mechanical Engineering, Gangneung-Wonju National University
1강릉원주대학교 기계공학과
*Corresponding Author
30 June 2025. pp. 19-26
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Abstract

Can-annular combustor systems exhibit unique thermoacoustic characteristics due to cross-talk coupling effects between individual cans. This study investigates these characteristics and validates the use of cross-talk acoustic boundary conditions for predicting system behavior through single-can analysis within a full-scale can-annular combustor system. A three-dimensional acoustic analysis was performed using a Helmholtz solver, and cross-talk boundary conditions derived from one-dimensional modeling were applied to the single-can configuration. The results demonstrate that single-can analysis incorporating cross-talk boundary conditions can accurately reproduce key system-level features, including mode clustering. This validated approach enables effective system prediction using single-can testing, thereby reducing the reliance on full-system experiments. However, limitations remain in the high-frequency range, where resonant modes associated with the transition piece geometry are not fully captured.

Keywords
Acoustic analysis
Can-annular combustor
Combustion instability
Cross-talk
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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 : 30
  • No :2
  • Pages :19-26
  • Received Date : 2025-06-05
  • Revised Date : 2025-06-09
  • Accepted Date : 2025-06-09
  • DOI :https://doi.org/10.15231/jksc.2025.30.2.019
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