Research progress in rotating detonation propulsion technology

Detonation, as a type of self-pressurizing combustion, offers significant advantages in thermodynamic cycle efficiency compared to traditional deflagration. This enhanced efficiency can substantially improve the propulsive performance of engines and is expected to drive a leapfrog development in aerospace propulsion technologies. The rotating detonation engine (RDE) has emerged as a significant developmental direction for future aerospace propulsion technologies, owing to the advantages of self-pressurization, single ignition requirement, and simple structure. This paper initially provides a brief introduction to the fundamental knowledge of rotating detonation, including common theoretical models, the triple-point structure and the fundamental structure of the flow field. Subsequently, the study provides a comprehensive review of the progress in research on rotating detonation propulsion technologies. The key technologies and applications of RDEs are highlighted, covering aspects such as combustor configurations, fuel injection, and ignition. The impact of non-ideal heat release on RDEs is also analyzed. Finally, the paper summarizes the existing research achievements and offers prospects for the future development of RDEs.