Examination of oscillating frequencies generated by combustion oscillation considering temperature distribution in a combustor tube fueled by natural gas and hydrogen mixture

Akane Uemichi, Kan Mitani, Yudai Yamasaki, Shigehiko Kaneko

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A combustion oscillation experiment fueling a mixture of hydrogen and natural gas was performed. The results showed oscillating frequencies of around 350 Hz in the case of the town gas only, whereas oscillating frequencies of around 200 and 400 Hz were observed in the hydrogen-containing fuel case. We hypothesized that the oscillating frequencies shift may occur by changing the temperature-distribution inside the tube, which was caused by different combustion conditions with the fuel mixture. As a result, the possible oscillating frequencies of not only around 350 Hz but also around 200 and 400 Hz were obtained. Although three types of possible oscillating frequencies were obtained in our previous study, more detailed temperature distributions should be considered to clarify the effect of the changing fuel mixture composition. In this paper, representative one-dimensional temperature distributions were formed by the combination of measured and calculated temperature distributions in the combustion tube for the corresponding fuel mixture. To include the detailed temperature distributions, the acoustic network model was divided into enough small elements to express the temperature distributions, where each element was connected by the transfer matrix. Then, the possible oscillating frequencies were calculated, taking account of the influence of the temperature distributions.

Original languageEnglish
Title of host publicationFluid-Structure Interaction
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791883846
DOIs
Publication statusPublished - 2020
EventASME 2020 Pressure Vessels and Piping Conference, PVP 2020 - Virtual, Online
Duration: 2020 Aug 3 → …

Publication series

NameAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume4
ISSN (Print)0277-027X

Conference

ConferenceASME 2020 Pressure Vessels and Piping Conference, PVP 2020
CityVirtual, Online
Period20/8/3 → …

Keywords

  • Acoustic network model
  • Combustion oscillation
  • Hydrogen
  • Oscillating frequencies

ASJC Scopus subject areas

  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Examination of oscillating frequencies generated by combustion oscillation considering temperature distribution in a combustor tube fueled by natural gas and hydrogen mixture'. Together they form a unique fingerprint.

Cite this