0
research-article

EXPERIMENTAL STUDY OF THERMO-ACOUSTIC INSTABILITY TRIGGERING IN A STAGED LIQUID FUEL COMBUSTOR USING HIGH-SPEED OH-PLIF

[+] Author and Article Information
Antoine Renaud

Aeronautical Technology Directorate, Japan Aerospace Exploration Agency, (JAXA) & Faculty of Science and Technology, Keio University, Tokyo, Japan
antoine.renaud@centralesupelec.fr

Shigeru Tachibana

Aeronautical Technology Directorate, Japan Aerospace Exploration Agency, (JAXA), Tokyo, Japan
tachibana.shigeru@jaxa.jp

Shuta Arase

Faculty of Science and Technology, Keio University, Tokyo, Japan
shuta-ht1985@a8.keio.jp

Takeshi Yokomori

Faculty of Science and Technology, Keio University, Tokyo, Japan
yokomori@mech.keio.ac.jp

1Corresponding author.

ASME doi:10.1115/1.4038915 History: Received November 09, 2017; Revised December 12, 2017

Abstract

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 the same. This frequency change is studied using time-frequency analysis to highlight a change in the feedback mechanism characterized by a modification of the time delay between pressure and heat release fluctuations.

Copyright (c) 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In