Experimental investigation on propagation characteristics of liquid-fuel/preheated-air rotating detonation wave

• Published in: International journal of hydrogen energy Vol. 47; no. 57; pp. 24080 - 24092
• Main Authors: Ma, Yuan, Zhou, Shengbing, Ma, Hu, Ge, Gaoyang, Yu, Dehui, Zou, Gang, Liang, Zuotang, Zhang, Taifeng
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 05-07-2022
• Subjects: Air total temperature; Equivalence ratio; Liquid fuel; Rotating detonation combustor; Rotating detonation wave; Rotating detonation wave; Liquid fuel; Equivalence ratio; Air total temperature; Rotating detonation combustor
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2022.05.186

The rotating detonation combustor can be applied to the turbine engine to develop into a new power device, and the liquid-fuel/air rotating denotation has important research significance for engine applications. In this research, the propagation characteristics of liquid-fuel/air rotating detonation wave were experimentally investigated. A hydrocarbon mixture—liquid gasoline was employed for the fuel, the oxidizer was high-temperature air preheated by a hydrogen-oxygen heater, and the rotating detonation wave was initiated via a hydrogen-oxygen pre-detonator. The effects of the equivalence ratio, ignition pressure, and air total temperature on the propagation characteristics of the liquid-fuel rotating detonation wave were analyzed. The liquid-fuel/air continuous rotating detonation wave can be successfully obtained with a single-wave mode, and the velocity and peak pressure of the rotating detonation waves increase as the equivalence ratio increases. As the detonation-wave pressures at the outlet of the pre-detonator increase, the establishment time of the rotating detonation wave gradually decreases, and the average establishment time is 4.01 ms. Stable rotating detonation waves are obtained with the air total temperature of 600–800 K, but the intensity of the detonation wave has a large deficit due to some instabilities.
•Experiments on liquid fuel-air RDW was successfully carried out.•Propagation characteristics of liquid fuel-air RDW were obtained.•Effects of air total temperature on RDW were experimentally analyzed.