Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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Analysis of Combustion Instabilities in a 2-stage Duct System using Transfer Functions

전달함수를 이용한 2단 덕트 시스템에서의 연소불안정 해석

  • 김선영 (강릉원주대학교 기계공학과) ;
  • 김대식 (강릉원주대학교 기계공학과)
  • Received : 2021.10.05
  • Accepted : 2021.11.24
  • Published : 2021.12.31
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Abstract

In this paper, using a transfer function-based analytical model, major factors influencing the acoustics and combustion instability in a two-stage duct system composed of a nozzle and a combustor were derived and their quantitative effects were evaluated. From the acoustic analysis, it was confirmed that the change in reflection coefficient and mean flow could have a great influence on the instability growth rate, and the area ratio and speed of sound ratio between the nozzle and the combustor are also key parameters to determine combustion instability as well as flame transfer functions.

Keywords

Acknowledgement

이 논문은 2021년도 정부(산업통상자원부)의 재원으로 한국에너지기술평가원의 지원을 받아 수행된 연구임(20217010100030, 표준 가스복합발전용 주기기 설계 및 제작 기술 개발).

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