抄録
An experimental study on the unsteady combustion of the n-decane droplet in microgravity was performed. Experimental observations were performed in a drop tower to create a microgravity condition. The initial droplet diameter was varied and the unsteady behavior of the burning rate was investigated. The effect of CO2 in the ambience on the burning rate and soot formation was also investigated. The results indicated the staged behavior of the burning rate for n-decane droplet combustion in air, and it might be due to the soot shell agglomeration and collapse. The staged behavior was not observed when the initial droplet diameter was small. The intensity of the luminous flame of n-decane droplets became weak with increase in CO2 concentration and the mitigation effect was greater as the initial droplet diameter decreases. The staged behavior of the burning rate was not observed when the concentration of CO2 in the ambience increased and the burning rate gradually increased with time. The unsteady behavior of the burning rate for n-decane droplet was apparently observed.
