Combustion and Flame Spread Characteristics of Liquid and Solid Combustible at High Altitude
To investigate the combustion characteristics of liquid and the flame spread characteristics over the surface of charring combustibles at high altitude, two series of experiments were conducted in Lhasa and Hefei, with altitude of 3658 m and 50 m respectively. The selected liquid and solid combustible are n-heptane and whitewood respectively. Several parameters, including the thermal radiation flux and fuel mass loss, flame height, flame spread rate, flame temperature, surface temperature, were measured. Results showed that, for the liquid (n-heptane) oil pan with same burning surface area, the burning rate, radiation heat flux and flame temperature at the high altitude was lower than those at the low altitude. For the same burning rate, the measured radiation heat flux at high altitude was lower than that at low altitude, though the average flame temperature was higher. For the solid combustible (whitewood), in the environment of lower pressure and oxygen concentration at high altitude, the flame height and flame spread rate over sample surface decreased, but the flame temperature increased slightly. However, with increasing of sample width, the relative difference between the flame spread rates at different altitudes decreased.
flame spread rate flame temperature flame height radiation heat fluz burning rate
FAN Weicheng SUN Jinhua LIU Naian WANG Jian JI Jie
State Key Laboratory of Fire Science,University of Science and Technology of China,Hefei 230027,China
国际会议
2009 International Symposium on Fire Science and Fire-Protection Engineering(2009火灾科学与消防工程国际学术会议)
北京
英文
18-23
2009-10-17（万方平台首次上网日期，不代表论文的发表时间）