Research progress of rotating detonation engine

Rotating detonation engines are known for their simple structure, light weight, low cost, and high thrust-to-weight ratio, which can significantly improve the power output, thrust-to-weight ratio, and fuel efficiency of propulsion systems. They are ideal choices for various types of hypersonic vehicles, suitable for air-breathing, rocket engines, and related combined cycle propulsion. Basic concepts and main features of rotating detonation engines were introduced, the research on domestic and international rotating detonation engines were summarized in detail, and the need for further in-depth research was proposed in the following areas: the injection and mixing mechanism of fuel and oxidizer, self-sustained stability and modal control of detonation waves, matching and collaborative design of upstream and downstream components, efficient thermal management and thermal protection technology, and the combined application of detonation engines. And recommendations for the technological development of rotating detonation engines in China were also offered.