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

홍수민; 김대식

doi:10.15435/jilasskr.2022.27.1.36

3차원 유한요소해석 기법을 사용한 수소-천연가스 혼소 가스터빈 연소기에서의 연소불안정 해석
Combustion Instability Modeling in a Hydrogen-Natural Gas Mixed Fuel Gas Turbine Combustor using a 3-Dimensional Finite Element Method Approach 원문보기

한국분무공학회지 = Journal of ilass-korea, v.27 no.1, 2022년, pp.36 - 41

홍수민 (강릉원주대학교 기계공학과) , 김대식 (강릉원주대학교 기계공학과)

Abstract ▼ AI-Helper

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.

주제어

표/그림 (8)

그림 Fig. 1 Schematic of hydrogen-natural gas mixed fuel gas turbine single nozzle system⁽¹²⁾
그림 Fig. 2 Simplified geometry for acoustic modeling
그림 Fig. 3 OH-PLIF images with various hydrogen compositions in fuel⁽¹²⁾
그림 Fig. 4 Definition of time delay for thermo-acoustic modeling
표 Table 1 Modeling conditions
$Fig. 5 Mode transition with increase in hydrogen fraction$ 그림 Fig. 5 Mode transition with increase in hydrogen fraction
그림 Fig. 6 Predicted instability frequencies as a function of gain and time delay
그림 Fig. 7 Predicted instability growth rate as a function of gain and time delay

참고문헌 (14)

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상세보기
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상세보기
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상세보기
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