A Theoretical Review of Rotating Detonation Engines

Abstract

Rotating detonation engines are a novel device for generating thrust from combustion, in a highly efficient, yet mechanically simple form. This chapter presents a detailed literature review of rotating detonation engines. Particular focus is placed on the theoretical aspects and the fundamental operating principles of these engines. The review covers both experimental and computational studies, in order to identify gaps in current understanding. This will allow the identification of future work that is required to further develop rotating detonation engines.

Effects of Injector Configuration on the Detonation Characteristics and Propulsion Performance of Rotating Detonation Engine (RDE)

“…The PDT length was sufficient for DDT with a 4.22 mm inner diameter based on previous research results [33]. To generate a single detonation wave, the PDT was installed tangentially to the RDE combustion channel [34]. The PDT also used the same propellant as RDE and caused ignitions via a spark plug with a spark coil.…”

Structural Optimization of Regeneratively Cooled Rotating Detonation Rocket Engines

“…Hargus et al mention the overall engine architecture can be simplified since the combustion reaction results in a pressure gain, thus reducing the demand on upstream turbomachinery to increase pressure which presents another opportunity for system size reduction [4]. Additionally, Boller [1], Braun et al [3], and Hargus et al [4], among other researchers [5,6], have theorized that a detonation reaction can be more efficient than deflagration because the rapid reaction time prevents expansion of the reacting gases, resulting in a near isochoric reaction. The heat addition in the isochoric reaction leads to lower entropy production than the approximately isobaric deflagration reaction.…”