Experimental Visualization of the Structure of Rotating Detonation Waves in a Disk-Shaped Combustor

The rotating detonation engine is a propulsion system that obtains thrust using continuously existing detonation waves. A rotating detonation combustor usually has an annular shape that allows detonation waves to propagate in the circumferential direction. In this study, we used a disk-shaped rotati...

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Bibliographic Details
Published in:Journal of propulsion and power 2017-01, Vol.33 (1), p.80-88
Main Authors: Nakagami, Soma, Matsuoka, Ken, Kasahara, Jiro, Kumazawa, Yoshiki, Fujii, Jumpei, Matsuo, Akiko, Funaki, Ikkoh
Format: Article
Language:English
Subjects:
Combustion
Combustion chambers
Detonation
Detonation waves
Oxidizers
Oxidizing agents
Propulsion
Propulsion systems
Rotating disks
Rotation
Shadowgraph photography
Visualization
Wave propagation
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Summary:The rotating detonation engine is a propulsion system that obtains thrust using continuously existing detonation waves. A rotating detonation combustor usually has an annular shape that allows detonation waves to propagate in the circumferential direction. In this study, we used a disk-shaped rotating detonation combustor with a combustion chamber with flat-plane glass walls to observe the structure of the phenomena. Self-luminescence, shadowgraphs, and schlieren visualization experiments were performed and compared. Results revealed that detonation waves were propagating in a mixture layer of three gases, fuel, oxidizer, and burned gas at 1600 to 900  m/s; Chapman-Jouguet velocity was 2376  m/s. Waves maintained a three-dimensional complicated wave shape in the disk-shaped combustion chamber with parallel-jet injectors.
ISSN:0748-4658
1533-3876
DOI:10.2514/1.B36084