Interactive Effects in Two-Droplets Combustion of RP-3 Kerosene under Sub-Atmospheric Pressure

Processes

Kefa Cen¹  Jie Huang¹  Hongtao Zhang¹  Zhihua Wang¹  Yong He¹ 

[1] State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China;

关键词: kerosene droplets;    high-speed cinematography;    microexplosion;    interactive effects;    sub-atmospheric pressure;   

DOI  :  10.3390/pr9071229

来源: DOAJ

【 摘 要 】

To improve our understanding of the interactive effects in combustion of binary multicomponent fuel droplets at sub-atmospheric pressure, combustion experiments were conducted on two fibre-supported RP-3 kerosene droplets at pressures from 0.2 to 1.0 bar. The burning life of the interactive droplets was recorded by a high-speed camera and a mirrorless camera. The results showed that the flame propagation time from burning droplet to unburned droplet was proportional to the normalised spacing distance between droplets and the ambient pressure. Meanwhile, the maximum normalised spacing distance from which the left droplet can be ignited has been investigated under different ambient pressure. The burning rate was evaluated and found to have the same trend as the single droplet combustion, which decreased with the reduction in the pressure. For every experiment, the interactive coefficient was less than one owing to the oxygen competition, except for the experiment at L/D₀ = 2.5 and P = 1.0 bar. During the interactive combustion, puffing and microexplosion were found to have a significant impact on secondary atomization, ignition and extinction.

【 授权许可】

Unknown