Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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Combustion Instability Modeling in a Hydrogen-Natural Gas Mixed Fuel Gas Turbine Combustor using a 3-Dimensional Finite Element Method Approach

3차원 유한요소해석 기법을 사용한 수소-천연가스 혼소 가스터빈 연소기에서의 연소불안정 해석

  • 홍수민 (강릉원주대학교 기계공학과) ;
  • 김대식 (강릉원주대학교 기계공학과)
  • Received : 2022.02.27
  • Accepted : 2022.03.07
  • Published : 2022.03.31
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Abstract

In this study, the combustion instability characteristics according to the change in the hydrogen ratio in the fuel in the single nozzle system of the hydrogen-natural gas mixed gas turbine for power generation was analyzed using a three-dimensional finite element analysis-based Helmholtz solver. This combustor shows the instability characteristics in which mode transition occurs from a mode having a low amplitude near 70 Hz to a mode having a high amplitude of 250 Hz or higher as the hydrogen fraction in the fuel increases. The current modeling results are found to reasonably predict the main characteristics of the change in measured instability frequency and growth rate with the change in fuel composition.

Keywords

Acknowledgement

이 논문은 2020년도 정부(산업통상자원부)의 재원으로 한국에너지기술평가원의 지원(20206710100030)받아 수행된 결과입니다.

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