Correlation of rate of gas temperature rise with mass loss rate in a ceiling vented compartment  

作　　者：Ruiyu Chen Shouxiang Lu Bosi Zhang Changhai Li Siuming Lo 

机构地区：[1]State Key Laboratory of Fire Science, University of Science and Technology of China [2]Department of Civil and Architectural Engineering, City University of Hong Kong [3]USTC-CityU Joint Advanced Research Centre

出　　处：《Chinese Science Bulletin》2014年第33期4559-4567,共9页

基　　金：supported by the Research Fundfor the Doctoral Program of Higher Education of China(20123402110048 and 20123402120018);the National Natural Science Foundation of China(51206157)

摘　　要：n-heptane pool fire and industrial alcohol pool fire in a ceiling vented compartment were studied experimentally. The parameters including mass loss rate and rate of gas temperature rise were investigated. The results suggest that the rate of gas temperature rise, whose variations were highly coincident with those of the mass loss rate, minimized at the moment of extinction. The correlation of the rate of average nondimensional temperature rise with mass loss rate was established. It was found that the rate of average nondimensional temperature rise may be correlated with mass loss rate via the gas heat absorption coefficient which was found to be a quadratic function of the nondimensional heat release rate for the ceiling vented compartment under study. The present study may be of practical use for estimation of the time-dependent changes in mass loss rate from the gas temperature curves.n-heptane pool fire and industrial alcohol pool fire in a ceiling vented compartment were studied experimentally. The parameters including mass loss rate and rate of gas temperature rise were investigated. The results suggest that the rate of gas temperature rise, whose varia- tions were highly coincident with those of the mass loss rate, minimized at the moment of extinction. The correlation of the rate of average nondimensional temperature rise with mass loss rate was established. It was found that the rate of average nondimensional temperature rise may be correlated with mass loss rate via the gas heat absorption coefficient which was found to be a quadratic function of the nondimensional heat release rate for the ceiling vented compartment under study. The present study may be of practical use for estimation of the time-dependent changes in mass loss rate from the gas temperature curves.

关 键 词：质量损失率 温度上升 气体 热释放速率 隔室 排气 顶棚 时间依赖性 

分 类 号：TU998.1[建筑科学—市政工程] TS262.2[轻工技术与工程—发酵工程]