Buoyant opening spill flame behaviors beneath a horizontal projection induced by a compartment fire

ABSTRACT

This paper investigates the effects of the horizontal projection on the spill flame ejected from an enclosure. Experiments were carried out in a reduced-scale enclosure and a horizontal projection was installed above the opening. The spill flame beneath a horizontal projection is composed of a horizontal momentum-dominated rectangle region and a buoyancy-dominated semicircle region. The overall averaged excess air ratio and the averaged entrainment coefficient of the spill flame beneath a horizontal projection were investigated. A theoretical model for the total flame length was developed. The model predictions agree well with the measured values.

KEYWORDS:

• Horizontal projection
• Enclosure fire
• Spill flame
• Under-ventilated fires
• Air entrainment
• Flame length

Additional information

Funding

This work was supported by National Natural Science Foundation of China (NSFC) [grant number 51406046], Opening Fund of State Key Laboratory of Fire Science (SKLFS) [grant numbers HZ2016-KF12 and HZ2017-KF08] Sichuan Science and Technology project grant number 2016JY0144, the Opening Fund of State Key Laboratory of Coal Mine Disaster Dynamics and Control under grant number 2011DA105287-FW201402 and the Fundamental Research Funds for the Central Universities [grant numbers CQU2018CDHB1B06 and 2018CDXYCH0015].