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Original Articles

Comparison between Ideal and Slot Injection in a Rotating Detonation Engine

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Pages 557-578 | Received 05 Dec 2014, Accepted 30 Aug 2017, Published online: 12 Dec 2017
 

ABSTRACT

Computational Fluid Dynamics (CFD) was used to investigate the flow in a rotating detonation engine (RDE) with ideal and slot injection of H2-air at stoichiometric conditions. A detailed kinetic mechanism was used to show that a stable, grid independent, rotating detonation traveling at the correct speed could be established for ideal injection. Stable rotating detonation was not sustained when slot injectors were used with an area ratio of 0.2. Numerical experiments showed that a higher area ratio is required to establish a single rotating detonation when using a realistic kinetics model. A one-step kinetic model with longer induction time was used to establish a stable rotating detonation wave within the engine for injectors with an area ratio of 0.2. These studies point to issues with the presence of hot burned gas in the head-end of the RDE affecting the stability of RDE operation.

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