한국수소및신에너지학회논문집 (Transactions of the Korean hydrogen and new energy society)

  • 제29권5호
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  • Pages.538-548
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  • 2018
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  • 1738-7264(pISSN)
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  • 2288-7407(eISSN)
한국수소및신에너지학회 (The Korean Hydrogen and New Energy Society)
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이산형 열-음향 모델을 이용한 부하 변동시 가스터빈 연소 불안정 특성

Combustion Instability of Gas Turbine with Segmented Dynamic Thermo-Acoustic Model under Load Follow-Up

  • 정지웅 (충남대학교 기계공학부) ;
  • 한재영 (충남대학교 첨단수송체연구소) ;
  • 정진희 (충남대학교 첨단수송체연구소) ;
  • 유상석 (충남대학교 기계공학부)
  • JEONG, JIWOONG (Department of Mechanical Engineering, Chungnam National University) ;
  • HAN, JAEYOUNG (Institute of Advanced Transportation Vehicles (IATV), Chungnam National University) ;
  • JEONG, JINHEE (Institute of Advanced Transportation Vehicles (IATV), Chungnam National University) ;
  • YU, SANGSEOK (Department of Mechanical Engineering, Chungnam National University)
  • 투고 : 2018.09.18
  • 심사 : 2018.10.30
  • 발행 : 2018.10.30
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초록

The thermo-acoustic instability in the combustion process of a gas turbine is caused by the interaction of the heat release mechanism and the pressure perturbation. These acoustic vibrations cause fatigue failure of the combustor and decrease the combustion efficiency. This study is to develop a segmented dynamic thermo-acoustic model to understand combustion instability of gas turbine. Therefore, this study required a dynamic analysis rather than static analysis, and developed a segmented model that can analyze the performance of the system over time using the Matlab/Simulink. The developed model can confirm the thermo-acoustic combustion instability and exhaust gas concentration in the combustion chamber according to the equivalent ratio change, and confirm the thermo-acoustic combustion instability for the inlet temperature and the load changes. As a result, segmented dynamic thermo-acoustic model has been developed to analyze combustion instability under the operating condition.

키워드

참고문헌

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