Influence of low air pressure on combustion characteristics and flame pulsation frequency of pool fires

Fuel ◽  
2011 ◽  
Vol 90 (8) ◽  
pp. 2760-2766 ◽  
Author(s):  
Jun Fang ◽  
Ran Tu ◽  
Jin-fu Guan ◽  
Jin-jun Wang ◽  
Yong-ming Zhang
Keyword(s):  
Combustion Characteristics ◽  
Air Pressure ◽  
Pulsation Frequency ◽  
Pool Fires ◽  
Flame Pulsation

Combustion Characteristics of Pool Fires Under Low Atmospheric Pressures

2011 ◽  
Author(s):  
Changfa Tao ◽  
Xishi Wang ◽  
Xin Cai
Keyword(s):  
Burning Rate ◽  
Ambient Pressure ◽  
Liquid Pool ◽  
Combustion Characteristics ◽  
Temperature History ◽  
Small Scale ◽  
Pulsation Frequency ◽  
Pool Fires ◽  
Mass Burning Rate ◽  
Flame Pulsation

In order to study the effects of low atmospheric pressure conditions on combustion characteristics of liquid pool fires, a 1.0m×1.0m×1.0m airtight steel box was constructed and used for altering the ambient pressure with a vacuum pump. Gasoline, diesel oil and n-heptane were tested as the liquid fuels. The mass burning rate, flame pulsation frequency and flame local temperature history of the small scale pool fires were experimentally determined. The results show that the mass burning rate, flame pulsation frequency decrease with the decrease of ambient pressure, while the pulsating intensity is strengthened slightly for the n-heptane flame and weakened for the gasoline flame. It is also shown that the high temperature area of the flame moves upward with the decrease of ambient pressure.

scholarly journals Influence of Different Low Air Pressure on Combustion Characteristics of Ethanol Pool Fires

2013 ◽  
Vol 62 ◽  
pp. 226-233 ◽  
Author(s):  
Cuipeng Kuang ◽  
Yuanzhou Li ◽  
Shi Zhu ◽  
Jian Li
Keyword(s):  
Combustion Characteristics ◽  
Air Pressure ◽  
Pool Fires

Study on Burning Characteristics of Small-Scale Ethanol Pool Fire in Closed and Open Space Under Low Air Pressure

2011 ◽  
Author(s):  
Yi Zeng ◽  
Jun Fang ◽  
Ran Tu ◽  
Jinjun Wang ◽  
Yongming Zhang
Keyword(s):  
Burning Rate ◽  
Open Space ◽  
Flame Temperature ◽  
Pool Fire ◽  
Air Pressure ◽  
Small Scale ◽  
Pulsation Frequency ◽  
Pool Fires ◽  
Closed Space ◽  
Ambient Conditions

This paper presents results of different burning rates of small-scale ethanol pool fires at pressures of 0.6∼1.0 atm in closed and open space. Experiments were performed using a square burner of side length of 4 cm under two different conditions: one was taken in a closed low air pressure cabin (0.5 m3, the interior pressure ranges from 0.6–1.0 atm); another was taken in open space respectively in Hefei (air pressure: 1.0 atm) and Lhasa (air pressure: 0.66 atm). The pool fire characteristics including the burning rate, the axial temperature and pulsation frequency of flame were measured. In closed space, the burning rate, flame temperature, and pulsation frequency of small-scale ethanol pool fires decreased with the decreasing pressure, while in open space they increased when the air pressure reduced. As a result of different ambient conditions and oxygen depletion, the burning rate, flame temperature and pulsation frequency were lower at lower air pressure in closed space but were higher at higher air pressure in open space.

Experimental study of the combustion characteristics of methanol-gasoline blends pool fires in a full-scale tunnel

2018 ◽  
Vol 42 (4) ◽  
pp. 386-393 ◽  
Author(s):  
Xiangliang Tian ◽  
Maohua Zhong ◽  
Congling Shi ◽  
Peihong Zhang ◽  
Chang Liu
Keyword(s):  
Experimental Study ◽  
Full Scale ◽  
Combustion Characteristics ◽  
Pool Fires

Experimental study on combustion characteristics of blended fuel pool fires

2019 ◽  
Vol 37 (3) ◽  
pp. 236-256 ◽  
Author(s):  
Xuehui Wang ◽  
Tiannian Zhou ◽  
Qinpei Chen ◽  
Junjiang He ◽  
Zheng Zhang ◽  
...  
Keyword(s):  
Volatile Component ◽  
Combustion Characteristics ◽  
Boiling Temperature ◽  
Flame Height ◽  
Distribution Model ◽  
Pool Fires ◽  
Burning Process ◽  
Fuel Blends ◽  
Axial Temperature ◽  
Blended Fuel

Liquid–vapor phase equilibrium theories are used to analyze boiling processes of blended fuel pool fires, and the results show that there are two boiling mechanisms (azeotropism and non-azeotropism) for blended fuels compared with single-component fuels. A series of pool fire experiments were conducted to investigate the combustion characteristics of blended fuel pool fires. The experimental results showed that the two boiling mechanisms have different effects on the burning process of the fuel blends. The boiling temperature and composition varied for the non-azeotropic blends during the burning process and remained steady for azeotropic blends. Furthermore, the boiling temperature of azeotropic blends is lower than that of its components and ranges from a specific temperature to the boiling point of the less volatile component. The flame radiant fraction of the azeotropic blend was also relatively constant during the burning process, whereas that of the non-azeotropic blend varied in different stages of the burning process. Heskestad’s flame height model and flame axial temperature distribution model are applicable for pool fires of azeotropic and non-azeotropic blends.

Combustion Characteristics of Electrolyte Pool Fires for Lithium Ion Batteries

2016 ◽  
Vol 163 (9) ◽  
pp. A2022-A2028 ◽  
Author(s):  
Yangyang Fu ◽  
Song Lu ◽  
Long Shi ◽  
Xudong Cheng ◽  
Heping Zhang
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Combustion Characteristics ◽  
Pool Fires
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