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Article Dans Une Revue Journal of Engineering for Gas Turbines and Power Année : 2018

Experimental Study of Thermo-Acoustic Instability Triggering in a Staged Liquid Fuel Combustor Using High-Speed OH-PLIF

Résumé

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, 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 the mode shape remains
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Dates et versions

hal-01757145 , version 1 (03-04-2018)

Identifiants

Citer

Antoine Renaud, Shigeru Tachibana, Shuta Arase, Takeshi Yokomori. Experimental Study of Thermo-Acoustic Instability Triggering in a Staged Liquid Fuel Combustor Using High-Speed OH-PLIF. Journal of Engineering for Gas Turbines and Power, 2018, 140 (8), ⟨10.1115/1.4038915⟩. ⟨hal-01757145⟩
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