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.

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.

Thermal Interaction Between a Circular Pipe and Diesel Pool Fire

2012 ◽  
Author(s):  
S. Sudheer ◽  
S. V. Prabhu
Keyword(s):  
Burning Rate ◽  
Pool Fire ◽  
Circular Pipe ◽  
Blockage Ratio ◽  
Pool Fires ◽  
Cylindrical Container ◽  
Mass Burning Rate ◽  
Insulating Material ◽  
Fire Experiments

Characterization of pool fires in the presence of cylindrical containers is highly relevant for various applications. A cylindrical container is idealized as a circular pipe packed with insulating material inside. Open pool fire experiments are conducted with a cylindrical container located at the center. The pool fire diameters considered were 0.5 m, 0.7 m and 1.0 m with diesel as the fuel. The cylindrical containers are made of stainless steel 304L. The outer diameters of the pipes are 114 mm, 168 mm and of thickness 8.6 mm, 7.1 mm respectively. The effect of blockage ratio on the mass burning rate for vertical and horizontal orientations of 168 mm cylindrical container is studied. It is observed that there is no significant change in mass burning rate due to the blockage effect. Temperatures are measured at various locations inside the pipes and at the center of the insulation. It is observed that the temperatures along a plane perpendicular to the axis are uniform when the pipes are vertically oriented. IHCP 1D code is applied to estimate the incident heat flux on to the bodies when immersed in open pool fires with different orientations.

Experimental study on burning rate of small scale heptane pool fires

2010 ◽  
Vol 55 (10) ◽  
pp. 973-979 ◽  
Author(s):  
QuanSheng Kang ◽  
ShouXiang Lu ◽  
Bing Chen
Keyword(s):  
Experimental Study ◽  
Burning Rate ◽  
Small Scale ◽  
Pool Fires

Multicomponent pool fires: Trends in burning rate, flame height, and flame temperature

Fuel ◽  
2021 ◽  
Vol 284 ◽  
pp. 118913
Author(s):  
Aaron Yip ◽  
Jan B. Haelssig ◽  
Michael J. Pegg
Keyword(s):  
Burning Rate ◽  
Flame Temperature ◽  
Flame Height ◽  
Pool Fires

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

Experimental Study of Mass Burning Rate of Liquid Pool Fires Under Dynamic Pressure in an Altitude Chamber

2017 ◽  
Author(s):  
Zhenxiang Tao ◽  
Rui Yang ◽  
Cong Li ◽  
Yina Yao ◽  
Wei Wang
Keyword(s):  
Burning Rate ◽  
Dynamic Pressure ◽  
Ambient Pressure ◽  
Flame Temperature ◽  
Great Influence ◽  
Liquid Pool ◽  
Combustion Characteristics ◽  
Chamber Pressure ◽  
Pool Fires ◽  
Mass Burning Rate

To study the influence of dynamic pressure on the liquid combustion characteristics, two kind sizes of pool fires were studied under varied pressure rates, namely 100Pa/s, 200Pa/s, 300Pa/s from 90kPa to 38kPa in an altitude chamber which size is 2m*3m*4.65m. Combustion characteristics of n-heptane pool fires, such as mass burning rate, flame temperature, chamber pressure were measured in this research. Experiment results show that the mass burning rate of 20cm pool fires, decreases when the ambient pressure reduces, and the variation trend become more sharply when the dynamic pressure rate is increased, while 30cm pool fires at the beginning of the combustion stage almost remain constant, this is because fire heat feedback have a great influence on it. The results also show that compared to the radiation model, pressure model could be linear fitting better in a double logarithm coordinate, and oil pool fires under 300Pa/s of 20cm, 100Pa/s of 30cm the value of α obtained by the fitted curves were more closer to fixed pressure ones.

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