In order to study the ignition process and the propagation characteristics of the rotating detonation wave of the pre-detonation continuous-rotating detonation engine with curved pre-detonation tube,the pre-detonation ignition device of the H2/O2 curved pre-detonation tube was designed,and the pre-detonation ignition experiment was carried out,and the detonation characteristics of the kerosene/oxygen-enriched air rotating detonation engine with this pre-detonation tube were studied.With the help of high-frequency dynamic pressure sensor and high-speed photography,the dynamic changes of pressure signal and flow field during the experiment were recorded,and the initiation process and propagation characteristics of the rotating detonation wave were analyzed.The experimental results show that the initial detonation wave rapidly expands and decouples after reaching the inlet of the combustion chamber,forming two pressure waves propagating in opposite directions,and the pressure peak rapidly decays.After successful initiation,the detonation wave propagates in the combustion chamber in a double-wave collision mode,and the position of the double-wave collision changes continuously in each cycle.When the kerosene mass flow rate increases,the time interval for the formation of stable rotating detonation in the combustion chamber increases.In the stable working range,increasing the equivalence ratio can increase the average propagation speed of detonation wave.It is feasible to apply the curved pre-detonation tube to the ignition of kerosene/oxygen-enriched air rotating detonation engine,and the initiation process of kerosene/oxygen-enriched air rotating detonation engine is further revealed.
维普
万方数据
