This study investigates the stabilization mechanism and interaction between the detonation wave and core flow in a flow-through rotating detonation combustor (FT-RDC). Employing simultaneous high-speed shadowgraph and broadband CH* chemiluminescence, we unravel the unique flow-field dynamics and elucidate the propagation process from the detonation wave to stabilize core flow combustion. The FT-RDC is operated using an ethylene–air mixture under various test parameters to systematically introduce core flow and fuel to assess combustion stability. Results reveal that the RDC pilot enhances core combustion under stoichiometric and fuel rich core conditions, though fuel lean and solely core air flow conditions suppress the detonation wave, giving rise to weak rotating thermoacoustic waves. Additionally, higher RDC air mass flow rates exhibit a more pronounced interaction, as supported by dynamic pressure trends and fast Fourier transform analysis. Spectral proper orthogonal decomposition analysis unveils distinct transverse acoustic modes—first tangential, higher tangential, and radial—characterizing the intricate interaction and unique flow features. Furthermore, a novel algorithm was developed to dissect the different regions of the flow field, shedding light on the impact of the detonation on the core flow. These findings emphasize the critical role of operational parameters, particularly core flow rate and equivalence ratio, in shaping the interaction dynamics.
Simultaneous Shadowgraph and CH* Chemiluminescence of a Flow-Through Rotating Detonation Combustor
AIAA Journal ; 63 , 6 ; 2261-2271
01.06.2025
Aufsatz (Konferenz) , Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Hollow Rotating Detonation Combustor
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