헬름홀츠 솔버 기반의 3차원 열음향해석을 통한 발전용 단일 캔 연소기에서의 공진 모드 분석 = Resonance Mode Anlaysis in a Single Can-type Combustor through 3D Thermo-acoustic Analysis based on Helmholtz Solver

다국어 초록 (Multilingual Abstract)

This study conducted a 3D thermo-acoustic analysis based on the helmholtz solver to analyze the major resonance modes causing combustion instability in a single-can combustor. The experimental investigations were carried out on a test rig designed by the Korea Institute of Machinery & Materials (KIMM) under various conditions of hydrogen co-firing and fuel staging. Through these experiments, two primary unstable frequencies were identified. To determine the resonance modes of these frequencies, a 3D thermo-acoustic analysis was conducted using temperature information from the test rig. The results confirmed that the unstable frequencies observed in the experiments were all longitudinal modes. Additionally, the mode shapes identified in the analysis facilitated a simplification of the exit geometry for the low-order network model, confirming that this did not significantly affect the fundamental resonance modes.

참고문헌 (Reference)

1 A. Selamet, "Wave reflections from duct terminations" 109 (109): 1304-1311, 2001

2 J. O’Connor, "Understanding the role of flow dynamics in thermoacoustic combustion instability" 39 (39): 4583-4610, 2023

3 J. Betia, "Thermoacoustic instability considerations for high hydrogen combustion in lean premixed gas turbine combustors:A review" 1 : 33-57, 2021

4 G. Campa, "Prediction of the thermoacoustic combustion instabilities in practical annular combustor" 136 (136): 091504-, 2014

5 X. Han, "Prediction of combustion instability limit cycle oscillations by combining flame describing function simulations with a thermoacoustic network model" 162 : 3632-3647, 2015

6 T. Poinsot, "Prediction and control of combustion instabilities in real engines" 36 (36): 1-28, 2017

7 J. Goldmer, "Power to Gas : Hydrogen for power generation" GE Power 2019

8 G. A. Richards, "Paasive control of combustion dynamics in stationary gas turbines" 19 (19): 795-810, 2003

9 R. Magnusson, "Operation of SGT-600(24MW) DLE gas turbine with over 60% H2 in natural gas" GT2020-GT16332, 2020

10 S. Jella, "Numerical analysis of high frequency transverse instabilities in a cantype combustor" GT2023-GT103298, 2023

11 D. Cecere, "Gas turbine combustion technologies for hydrogen blends" 16 (16): 6829-, 2023

12 A. H. Lefebvre, "Gas turbine combustion : Alternative fuels and emissions 3rd edition" CRC Press 2010

13 J. Kim, "Experimental investigation of interactions between two closely spaced azimuthal modes in a multinozzle can combustor" 144 (144): 10121-, 2022

14 J. Kim, "Experimental investigation of fuel staging effect on modal dynamic of thermoacoustic azimuthal instabilities in a multi-nozzle can combustor" GT2021-GT59098, 2021

15 Y. Wang, "Effects of recess length on combustion instability in a model chamber with a gas-centered swirl coaxial injector" 130 : 107911-, 2022

16 K. Inoue, "Development of hydrogen and natural gas co-firing gas turbine" 55 (55): 1-6, 2018

17 손주찬 ; 김대식, "Combustion instability modeling in a reverse-flow gas turbine combustor using a network model" 26 (26): 20-28, 2021

18 H. T. Luong, "Combined applications of analytic methods for detection of combustion instability triggering" 118 : 106994-, 2021

19 "COMSOL Acoustic module user’s Guide"

20 A. Dowling, "Acoustic analysis of gas turbine combustors" 19 (19): 751-764, 2003

21 T. Lieuwen, "A mechanism of combustion instability in lean premixed gas turbine combustors" 123 (123): 182-189, 2001

22 S. Camporeale, "A finite element method for three-dimensional analysis of thermoacoustic combustion instability" 133 (133): 011506-, 2011

23 P. Kaufmann, "3D thermoacoustic properties of single can and multi can combustor configurations" GT2008-GT50755, 2008

24 임재영 ; 김대식, "3D acoustic field analysis in an annular combustor system under a cold flow condition" 21 (21): 49-56, 2017