Characterization of Rotating Detonation Engine Injector Response Using Laser-Induced Fluorescence

Rotating detonation engine (RDE) fuel injector response was characterized in a lab-scale linear testing platform. The experimental design consists of a linear extrusion of an RDE cross section and allows rapid interchanging of modular, 3D printed inlet geometries. An array of helium jets was establi...

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Bibliographic Details
Published in:Journal of propulsion and power 2019-07, Vol.35 (4), p.827-838
Main Authors: Bedick, Clinton, Ferguson, Don, Strakey, Peter
Format: Article
Language:English
Subjects:
Acetone
Design of experiments
Detonation
Dynamic pressure
ENGINEERING
Exchanging
Extrusion
Fuel injection
Helium
Injectors
Laser induced fluorescence
Recovery
Rotation
Three dimensional printing
Transducers
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Summary:Rotating detonation engine (RDE) fuel injector response was characterized in a lab-scale linear testing platform. The experimental design consists of a linear extrusion of an RDE cross section and allows rapid interchanging of modular, 3D printed inlet geometries. An array of helium jets was established within a channel, and a single combustion-driven shock pulse was presented at one end. The subsequent injector interruption and recovery were quantified using high-speed acetone planar-laser-induced fluorescence (PLIF). A quartz wall provided optical access to the channel and the injector response was visualized at up to 30 kHz. Three dynamic pressure transducers allowed the shock strength to be quantified along the length of the channel. Timescales associated with jet interruption and recovery were determined by analysis of instantaneous PLIF images and considered in conjunction with the dynamic pressure measurements. Results are presented as a function of pertinent nondimensional parameters and compared with available experimental and computational data in a full, research-scale RDE.
ISSN:0748-4658
1533-3876
DOI:10.2514/1.B37309