Ignition, puffing and sooting characteristics of kerosene droplet combustion under sub-atmospheric pressure

FUEL

卷:285

Article

Zhang, Hongtao¹  Wang, Zhihua¹  He, Yong¹  Xia, Jun^2,3  Zhang, Jincheng¹  Zhao, Hua^2,3  Cen, Kefa¹ 

[1] Zhejiang Univ, State Key Lab Clean Energy Utilizat, Hangzhou 310027, Peoples R China

[2] Brunel Univ London, Dept Mech & Aerosp Engn, Uxbridge UB8 3PH, Middx, England

[3] Brunel Univ London, Inst Energy Futures, Uxbridge UB8 3PH, Middx, England

关键词: Kerosene droplet;    Ignition;    Puffing;    Sooting;    Sub-atmospheric pressure;   

DOI  :  10.1016/j.fuel.2020.119182

来源: Elsevier

【 摘 要 】

The ignition, puffing and sooting characteristics of Chinese RP-3 kerosene droplet burning have been studied using high-speed, OH* chemiluminescence and soot thermal radiation imaging. The experiments were conducted in air at standard temperature and sub-atmospheric pressures ranging from 0.2 bar to 1 bar. The kerosene droplet was supported by a thermocouple tip and ignited by a retractable coiled heating wire. The results showed that the ignition delay time increased with a decrease of the ambient pressure, due to an increased distance between kerosene and oxygen molecules. Steady burning and disruptive burning were identified following the ignition. OH* chemiluminescence images showed a spherical flame and a longer flame standoff distance under a lower pressure. The puffing intensity was observed to be enhanced with a reduction of the ambient pressure, and a decreased pressure was found to lower the sooting emission.

【 授权许可】

Free