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

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.