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2024 Vol.29, Issue 4 Preview Page

Research Article

Influence of Nozzle Diameter on High-Frequency Transverse Instabilities in Multislit Hydrogen Combustors

노즐 직경 변화가 다중슬릿 수소 연소기의 고주파 횡방향 불안정에 미치는 영향

Juhyeok Kim1†
,
Kyu Tae Kim1
김 주혁1†
,
김 규태1
1Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology
1한국과학기술원 항공우주공학과
*Corresponding Author
31 December 2024. pp. 44-50
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Abstract

High-frequency transverse instabilities arising from lean-premixed hydrogen combustors were experimentally investigated to identify important trends in high-frequency modal dynamics, with a particular emphasis on the influence of nozzle diameter. Experimentally, we show that high-frequency transverse modes are triggered under relatively high thermal power and high temperature conditions. The dominant instability frequency and related modal dynamics depend heavily on the diameter of combustion liners, and the preferred nodal line position is observed to be governed by the presence of rotational asymmetry planes.

Keywords
Combustion instability
Gas turbine combustion
High frequency
Hydrogen
Transverse mode
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Information
  • Publisher :The Korean Society of Combustion
  • Publisher(Ko) :한국연소학회
  • Journal Title :Journal of the Korean Society of Combustion
  • Journal Title(Ko) :한국연소학회지
  • Volume : 29
  • No :4
  • Pages :44-50
  • Received Date : 2024-10-02
  • Revised Date : 2024-10-18
  • Accepted Date : 2024-10-18
  • DOI :https://doi.org/10.15231/jksc.2024.29.4.044
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