Visualization and CFD of the influence of mixing on detonation wave propagation inside a rotating-detonation engine by using linear detonation channel

In the flow field of a rotating detonation engine (RDE), the detonation wave propagates through the reaction with the continuously injected fuel and oxidant mixture. In the previous research using the actual RDE, due to insufficient mixing and other reasons, the detonation wave velocity generated in RDE is usually significantly lower than the characteristic Chapman-Jouguet wave velocity for corresponding mixture. In this paper, construct a linear detonation channel that simulate the RDE flow field. The effects of incomplete mixing of fuel and oxidizer mixture on the propagation of detonation waves in the RDE flow field are studied through experiments and numerical analysis. For the research method, a plane detonation wave propagating in a normal state generated in another detonation tube is used to plunging entry the fuel jet train, The two-dimensional numerical analysis of the premixed and non-premixed cases is carried out, and the feasibility of optically visualizing detonation waves by the point diffraction interferometry method is verified.