Liquid-Fuel Behavior in an Aeronautical Injector Submitted to Thermoacoustic Instabilities

The aim of this work is to study the role of the liquid phase in the thermoacoustic coupling, which subsequently leads to combustion instabilities. Experimental investigations were performed on an actual multipoint spray injector geometry used in real aeronautical combustors. A test bench was specif...

Full description

Saved in:
Bibliographic Details
Published in:Journal of propulsion and power 2015-01, Vol.31 (1), p.309-319
Main Authors: Apeloig, Julien M, d’Herbigny, François-Xavier, Simon, Frank, Gajan, Pierre, Orain, Mikael, Roux, Sébastien
Format: Article
Language:English
Subjects:
Aeronautics
Combustion chambers
Coupling
Data processing
Engineering Sciences
Fluctuation
Injectors
Instability
Joining
Kerosene
Laser applications
Liquid fuels
Liquid phases
Planar laser induced fluorescence
Sprayers
Sprays
Thermoacoustics
Vapor phases
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The aim of this work is to study the role of the liquid phase in the thermoacoustic coupling, which subsequently leads to combustion instabilities. Experimental investigations were performed on an actual multipoint spray injector geometry used in real aeronautical combustors. A test bench was specifically designed with continuously changeable acoustics conditions, which allows obtaining of a stable or an unstable flame for identical flow conditions. Different laser-based visualization techniques were used to analyze the kerosene spray (both liquid and vapor phases) and the heat released from the flame. A phase-averaged data processing of the planar laser-induced fluorescence images reveals the complex unsteady behavior of the liquid phase, its coupling with pressure fluctuations in the chamber, the heat released from the flame. The origins of the spray fluctuations are also analyzed.
ISSN:0748-4658
1533-3876
DOI:10.2514/1.B35290