Experimental study on propagation, quenching, and re-initiation characteristics of rotating detonation wave with liquid kerosene–oxygen-enriched air

•Experiments of Rotating Detonation Engine fueled by liquid kerosene in room temperature.•A new method for analyzing frequency characteristics in two-counter wave mode.•Analysis and verification of the mechanism of quenching and re-initiation in liquid-fueled Rotating Detonation Engine.•Stable propagation and smaller velocity deficit of liquid-fueled Rotating Detonation Engine in room temperature.