Study of the flame flow and combustion characteristics of pool fires around a bluff body in the ship engine room

Case Studies in Thermal Engineering

Shichuan Su¹  Yinshu Guo²  Liang Wang²  Kunda Du²  Wei Liu²  Zhongzheng Wu² 

[1] Corresponding author.;School of Energy and Power Engineering, Jiangsu University of Science and Technology, Zhenjiang, China;

关键词: Ship fire;    Bluff body;    Mechanical ventilation;    Temperature distribution;    Flow field;   

DOI  :  

来源: DOAJ

【 摘 要 】

In the development of a fire, all kinds of equipment in ship cabins cause flames to flow around them, which greatly affects the combustion characteristics of the flames. Experimental studies were conducted on a pool of 80 cm × 6 cm × 5 cm containing a bluff body with a diameter of 2 cm and a height of 15 cm. Using diesel fuel as an ignition source, the flame flow around the bluff body propagating as a crosswind at speeds of 0.8–2.4 m/s was studied. The results showed that the fluctuation of the mass loss in a rising period decreased. A new flame spreading phenomenon of “continuous-flow around-broken-retract” appeared. The average spreading rate affected by the bluff body had a quadratic nonlinear relationship with the intensity of airflow. A prediction model of the flame drag length for the rectangular pool containing a bluff body was established. In addition, there were two vortices near a bluff body that were symmetrical and flowed in opposite directions. The temperature at the standing vortices reached a maximum of approximately 260 °C. At the same time, the vortices presented the characteristics of periodic formation and shedding with an interval of approximately 3.6 s.

【 授权许可】

Unknown