전달 행렬 기법을 이용한 열음향 네트워크 모델 개발

• Published in: 한국연소학회지 Vol. 24; no. 2; pp. 9 - 16
• Main Authors: 박정운(Jeongun Park), 윤명곤(Myunggon Yoon), 김대식(Daesik Kim)
• Format: Journal Article
• Language: Korean
• Published: 한국연소학회 01.06.2019
• Subjects: 기계공학; Combustion Instability; Transfer matrix method; Thermoacoustic Model; Flame transfer function; Acoustic transfer function
• ISSN: 1226-0959; 2466-2089
• DOI: 10.15231/jksc.2019.24.2.009

In this paper, one-dimensional thermoacoustic model based on the transfer matrix approach is developed for studying combustion instabilities in a gas turbine combustor. Two different transfer functions are introduced for the closed-loop feedback system analysis. One is acoustic transfer function, which is derived from the conservation equations such as mass, momentum, and energy for a given problem. The other is flame transfer function, which quantifies the heat release response in the combustor to the incoming velocity fluctuations. Combining the acoustic and flame transfer functions, one can analyze the combustion instability in the closed-loop system. The calculated thermoacoustic instability behavior using the current model matches well with the experimental results in the literature. KCI Citation Count: 3