Experimental study of thermo-acoustic instability triggering in a staged liquid fuel combustor using high-speed OH-PLIF

Antoine Renaud, Shigeru Tachibana, Shuta Arase, Takeshi Yokomori

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

A staged injector developed by JAXA and fueled with kerosene is studied in a high-pressure combustion experiment. With a stable pilot fuel flow rate, the fuel flow rate in the main stage is progressively increased. A high-speed OH-PLIF system is used to record the flame motion at 10,000 fps. In the beginning of the recording, POD modes shows that the flame behavior is dominated by relatively low-frequency rotation due to the swirling motion of the flow. These rotational motions then coexist with a thermo-acoustic instability around 475 Hz which increases the amplitude of the pressure fluctuations inside the chamber. DMD analyses indicate that this instability is associated with a widening of the flame occurring when the pressure fluctuations are the highest, giving the instability a positive feedback. The instability frequency then abruptly switches to 500 Hz while retaining the same driving mechanisms. Potential candidates for this frequency change are proposed.

本文言語English
ホスト出版物のタイトルCombustion, Fuels and Emissions
出版社American Society of Mechanical Engineers (ASME)
ISBN(電子版)9780791850848
DOI
出版ステータスPublished - 2017
外部発表はい
イベントASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition, GT 2017 - Charlotte, United States
継続期間: 2017 6月 262017 6月 30

出版物シリーズ

名前Proceedings of the ASME Turbo Expo
4A-2017

Other

OtherASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition, GT 2017
国/地域United States
CityCharlotte
Period17/6/2617/6/30

ASJC Scopus subject areas

  • 工学一般

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