Experimental investigation of kerosene supersonic combustion test using aerated-liquid injectors

Experimental investigation of kerosene supersonic combustion was performed on direct-connect supersonic combustion test facility by using aerated-liquid injectors. In the test, kerosene equivalence ratio was 0.97 and 0.33, and hydrogen, air and nitrogen were used as effervescent gas respectively. The experimental results show that, cavity flameholders can achieve kerosene self-ignition and flame-holding effect by producing an eddy with low speed and high temperature, kerosene can prolong the resident time in combustor and achieve sufficient heating by the effect of this eddy. The hydrogen can self-ignite and release energy while injecting into the supersonic combustor, therefore adding hydrogen by aerated-liquid injector can improve the combustion performance of kerosene, and even achieve stable combustion without cavity flameholder.