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Research Article

Analysis of Combustion Instability Characteristics of a Single-Nozzle Combustor in a Natural Gas-Hydrogen Co-firing Gas Turbine under Varying Operating Pressures

압력 변화에 따른 천연가스-수소 혼소 가스터빈 싱글 노즐 연소기의 연소불안정 특성 분석

Junwoo Jung1
,
Daesik Kim1†
,
Min Kuk Kim2
,
Jeongjae Hwang2
,
Won June Lee2
정 준우1
,
김 대식1†
,
김 민국2
,
황 정재2
,
이 원준2
1Department of Mechanical Engineering, Gangneung-Wonju National University
2GT Research Team, Department of Carbon-free Power Generation, Korea Institute of Machinery
1강릉원주대학교 기계공학과
2한국기계연구원 무탄소발전연구실 가스터빈팀
*Corresponding Author
30 June 2025. pp. 27-35
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Abstract

This study analyzes combustion instability characteristics in a natural gas-hydrogen co-firing gas turbine single-nozzle combustor under varying pressure conditions. Experiments were conducted with hydrogen co-firing ratios of 0% and 30% at pressures from 1.3 to 3.0 bar, combined with OH* chemiluminescence imaging and 1D thermoacoustic analysis. Results show that both hydrogen co-firing and pressure increases reduce flame length, thereby decreasing time delay in the flame transfer function and increasing combustion instability susceptibility. 1D thermoacoustic analysis revealed that pressure effects occur through flame dynamics variations rather than acoustic mechanisms. Gain margin analysis demonstrates that the combined effects of hydrogen co-firing and pressure increases substantially reduce the stable operating envelope for this combustor configuration.

Keywords
Combustion instability
Hydrogen co-firing
Operating pressure
Thermoacoustic analysis
References
1

J. Jung, M. Kim, J. Hwang, D. Kang, W. Lee, H. Kim, D. Kim, Combustion instability characteristic via fuel nozzle modification in a hydrogen and natural gas Co-firing gas turbine combustor, Int. J. Hydrogen Energy, 79 (2024) 962-973.

10.1016/j.ijhydene.2024.07.054
2

J.G. Aguilar, E. Æsøy, J.R. Dawson, The influence of hydrogen on the stability of a perfectly premixed combustor, Combust. Flame, 245 (2022) 112323.

10.1016/j.combustflame.2022.112323
3

J. Kim, J. Kim, J. Lee, D. Kim, Effects of Fuel Composition on Flame Transfer Function in Lean Premixed Combustor, Journal of ILASS-Korea, 20(3) (2015) 135-140.

10.15435/JILASSKR.2015.20.3.135
4

J.M. Cohen, W. Proscia, Characterization and control of aeroengine combustion instability: Pratt & Whitney and NASA experience, Combustion Instabilities in Gas Turbine Engines, Chapter 6, (2005).

5

F. Di Sabatino T.F. Guiberti, W.R. Boyette, W.L. Roberts, J.P. Moeck, D.A. Lacoste, Effect of pressure on the transfer functions of premixed methane and propane swirl flames, Combust. Flame, 193 (2018) 272-282.

10.1016/j.combustflame.2018.03.011
6

C.J. Dasch, One-dimensional tomography: a comparison of Abel, onion-peeling, and filtered backprojection methods, Applied Optics, 31(8) (1992) 1146-1152.

10.1364/AO.31.00114620720732
7

A. Savitzky, M.J.E. Golay, Smoothing and differentiation of data by simplified least squares procedures, Analytical Chemistry, 36 (1964) 1627-1639.

10.1021/ac60214a047
8

M.G. Yoon, D. Kim, Acoustic transfer function of a combustion system with premixing chamber, Journal of Mechanical Science and Technology, 31(12) (2017) 6069-06076.

10.1007/s12206-017-1151-8
9

J. Kim, D. Kim, Combustion Instability Prediction Using 1D Thermoacoustic Model in a Gas Turbine Combustor, Journal of ILASS-Korea, 20(4) (2015) 241-246.

10.15435/JILASSKR.2015.20.4.241
10

L. Crocco, Aspects of Combustion Stability in Liquid Propellant Rocket Motors Part I: Fundamentals. Low Frequency Instability With Monopropellants, Journal of the American Rocket Society, 21(6) (1951) 163-178.

10.2514/8.4393
11

D. Kim, S. Joo, Y. Yoon, Effects of fuel line acoustics on the self-excited combustion instability mode transition with hydrogen-enriched laboratory-scale partially premixed combustor, Int. J. Hydrogen Energy, 45 (2020) 19956-19964.

10.1016/j.ijhydene.2020.05.074
12

Y. Pyo, J. Kim, D. Kim, Time lag Analysis Using Phase of Flame Transfer Function, Journal of ILASS- Korea, 21(2) (2016), 104-110.

10.15435/JILASSKR.2016.21.2.104
13

A. Aniello, D. Laera, S. Marragou, T. Poinsot, T. Schuller, L. Selle, Influence of pilot H2 injection on methane-air swirled flame stabilization and acoustic response, Combustion and Flame, 253 (2023) 112749.

10.1016/j.combustflame.2023.112749
14

H. Kang, C. Yoon, K.T. Kim, Experimental and numerical investigations of forced response of multi-element lean-premixed hydrogen flames, Combust. Flame, 258 (2023) 113079.

10.1016/j.combustflame.2023.113079
15

A.P. Dowling, S.R. Stow, Acoustic analysis of gas turbine combustors, Journal of Propulsion and Power, 19 (2003) 751-764.

10.2514/2.6192
16

J. Jang, J. Jung, M.K. Kim, J. Hwang, W.J. Lee, H.S. Kim, D. Kim, Combustion Instability Analysis in a Hydrogen-Natural Gas Co-firing Gas Turbine Combustor with Varying Pilot Ratios Using CFD and 1D Network Modeling Approach, Journal of ILASS-Korea, 30(1) (2025) 1-10.

Information
  • Publisher :The Korean Society of Combustion
  • Publisher(Ko) :한국연소학회
  • Journal Title :Journal of the Korean Society of Combustion
  • Journal Title(Ko) :한국연소학회지
  • Volume : 30
  • No :2
  • Pages :27-35
  • Received Date : 2025-06-08
  • Revised Date : 2025-06-09
  • Accepted Date : 2025-06-09
  • DOI :https://doi.org/10.15231/jksc.2025.30.2.027
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