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Heat Transfer Research
インパクトファクター: 1.199 5年インパクトファクター: 1.155 SJR: 0.267 SNIP: 0.503 CiteScore™: 1.4

ISSN 印刷: 1064-2285
ISSN オンライン: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.2016010282
pages 865-875

INFLUENCE OF HIGH ALTITUDE ON COMBUSTION EFFICIENCY AND RADIATION FRACTION OF HYDROCARBON FIRES

Haihang Li
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, Anhui, P.R. China; Safety and Environment Institute, College of Quality & Safety Engineering, China Jiliang University, Hangzhou 310018, P.R. China
Wei Yao
Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, P.R. China
Pan Li
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, Anhui, P.R. China
Zhihui Zhou
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, Anhui, P.R. China; China Waterborne Transport Research Institute, Beijing 100088, P.R. China
Jian Wang
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, Anhui, P.R. China

要約

Fire behaviors of three gaseous hydrocarbon fuels were experimentally measured and compared at two different altitudes (Lhasa city, 64 kPa at an altitude of 3650 m; Hefei city, 100 kPa at an altitude of 50 m). The heat release rates were calculated through a simplified thermochemistry based on the measured concentrations of O2 and CO2 in the exhaust duct, then the combustion efficiencies and the radiation fractions were compared at the two altitudes. The heat release rates and combustion efficiencies were higher at lower pressure, and the overall temperatures of methane fires rose at a lower pressure. The radiative heat fluxes and radiation fractions at a low pressure were smaller than those at a normal pressure, while the smoke transmittances of acetylene fi res at a low pressure were higher.


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