Analysis of Combustion Instability in a Single-Burner Test Rig with Variations in Hydrogen Co-Firing Ratio and Thermal Power

Jaewoo Jang; Sanghyeon Lee; Minsung Choi; Min Kuk Kim; Jeongjae Hwang; Do Won Kang; Daesik Kim

doi:10.6108/KSPE.2025.29.3.017

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2025 Vol.29, Issue 3 Preview Page Next Page

RESEARCH PAPERS

Analysis of Combustion Instability in a Single-Burner Test Rig with Variations in Hydrogen Co-Firing Ratio and Thermal Power 단일버너 연소 시험리그에서 수소 혼소율 및 출력 변화에 따른 연소불안정 해석

30 June 2025. pp. 17-26

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Abstract

In this study, the effects of hydrogen co-firing rates and thermal power variations on combustion instability were analyzed in a single burner combustion test rig, using CFD and 1D network modeling techniques. the time delay and its distribution in a flame zone derived from CFD were applied to the network model in order to evaluate the combustion instability characteristics. The analysis results confirmed that the key modeling characteristics closely matched the experimental measurements. Consequently, we verified that the increase in hydrogen co-firing rates and thermal power significantly influence the time delay and its distribution, and that these changes are the primary causes of alterations in combustion instability characteristics.

Keywords

1D Network Model

Time Delay

Time Delay Distribution

Combustion Instability

Computational Fluid Dynamics

본 연구에서는 CFD 해석과 1D 네트워크 모델링 기법을 활용하여 단일버너 연소 시험리그를 대상으로 수소 혼소율과 출력 변화가 연소불안정에 미치는 영향을 분석하였다. CFD 해석을 통해 화염으로부터 time delay와 time delay distribution을 도출한 후, 이를 네트워크 모델에 적용하여 수소 혼소율 및 출력 변화에 따른 연소불안정 특성을 분석하였다. 분석 결과, 주요 모델링 특성이 실험 결과와 잘 일치함을 확인하였다. 이를 통해 수소 혼소율과 출력의 증가는 time delay와 time delay distribution에 큰 영향을 미치며, 이러한 변화가 연소불안정 특성을 변화시키는 주요 원인임을 확인하였다.

키워드

1D 네트워크 모델

시간지연

시간지연분포

연소불안정

전산유체역학

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Information

Publisher :The Korean Society of Propulsion Engineers
Publisher(Ko) :한국추진공학회
Journal Title :Journal of the Korean Society of Propulsion Engineers
Journal Title(Ko) :한국추진공학회지
Volume : 29
No :3
Pages :17-26
Received Date : 2025-01-24
Revised Date : 2025-03-14
Accepted Date : 2025-03-16
DOI :https://doi.org/10.6108/KSPE.2025.29.3.017

Journal of the Korean Society of Propulsion Engineers ISSN:1226-6027(Print) 2288-4548(Online) 한국추진공학회지

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