In order to explore and improve the ignition-initiation characteristic of rotating detonation engine(RDE) and understand the effects of the ignition methods on the operating characteristics of RDE,the low-energy ignition device,high-energy ignition device and the pre-detonator were applied to initiate RDE,respectively. The experiments were carried out on the RDE with slot-orifice impinging injection method and the reactants were gaseous H_2-Air mixtures. The initiation characteristics of RDE with different ...