Ghosting flame mechanism under different extinctions modes in ceiling vent cabin

2021 ◽  
Author(s):  
Lixin Cong ◽  
Mingfei Lu ◽  
Chaoyi Xu
Keyword(s):  
2016 ◽  
pp. 783-791
Author(s):  
Qiang Li ◽  
Jinmei Li ◽  
Shijing Ren ◽  
Jiaqing Zhang
Keyword(s):  

2016 ◽  
Vol 135 ◽  
pp. 1-11 ◽  
Author(s):  
An-qi Chen ◽  
Qiang Li ◽  
Yi-ge Wang
Keyword(s):  

Author(s):  
W. K. Chow ◽  
S. S. Han ◽  
Y. Gao ◽  
H. Dong ◽  
Y. Huo ◽  
...  

Flame stretching in a room with a ceiling vent will be discussed in this short note. A real-scale model was constructed with a gasoline pool fire placed inside. Another pool fire of the same size and amount of fuel was burnt outside the model. Different pool sizes of diameters 0.07 m, 0.08 m, 0.11 m, 0.16 m and 0.2 m were set up. Volume of gasoline varied from 30 ml to 500 ml to give different burning durations. The flame lengths of the two fires were measured and compared. It is observed that the flame length of the pool fire inside the room was over 20% higher than that outside at the later stage of the fire.


2016 ◽  
Vol 135 ◽  
pp. 299-308 ◽  
Author(s):  
Qiang Li ◽  
Jin-mei Li ◽  
Jia-qing Zhang ◽  
Chang Liu ◽  
Shi-jing Ren

2018 ◽  
Vol 211 ◽  
pp. 358-364
Author(s):  
Jin-mei Li ◽  
Jia-qing Zhang ◽  
Qiang Li ◽  
Bo-si Zhang ◽  
Yang Jiang
Keyword(s):  

1993 ◽  
Vol 20 (2) ◽  
pp. 151-174 ◽  
Author(s):  
Cheok-Fah Than ◽  
Brian J. Savilonis
Keyword(s):  

2001 ◽  
Author(s):  
K. Wakatsuki ◽  
B. Ringwelski ◽  
J. G. Quintiere

Abstract The fire behavior of heptane burning in a poorly ventilated compartment was studied. The diameter of the heptane pan fires were varied and the ventilation opening size and location were adjusted. Two kinds of compartment fire experiment were conducted: (1) horizontal slits at the top and bottom of a wall, and (2) a single vent at the roof. Temperature, oxygen, fuel mass loss rate and differential pressure were measured. Extinction was studied with an oxygen meter to find the minimum oxygen concentration in the compartment achieved in ventilation-controlled fires. Extinguishments due to ventilation or complete fuel consumption was distinguished. Flow exchange was measured by differential pressure transducers. Particularly, flow exchange of ceiling vent was examined by calculation of flooding pressure difference, which will allow bi-directional flow. The wall vent case had oscillatory combustion (puffing), which sometimes leads to an increase in fire amplitude followed by extinction. This was not observed for the ceiling vent case. Video recording of the flame was conducted through a glass on sidewall. The fire behavior varied from conditions in which the flame extinguishes to cases of steady burning. In some cases, “ghosting flames” were observed.


2002 ◽  
Vol 11 (3) ◽  
pp. 229-254 ◽  
Author(s):  
J. LI ◽  
W. K. CHOW
Keyword(s):  

2008 ◽  
Author(s):  
W. K. Chow ◽  
C. K. Law

Flame stretching in a room with a ceiling vent will be discussed in this short note. A small model was constructed with a pool fire placed inside. Another pool fire of the same size and amount of fuel was burnt outside the model. The flame lengths of the two fires were measured and compared. It is observed that the flame length of the pool fire inside the model was higher than that outside. The value was even double at the later stage of the fire.


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