Experimental study of the influence of varying ceiling height on the heat release rate of a pool fire

7th International Conference on Environment and Industrial Innovation

生态环境科学;工业技术

Liu, Jiahao^1,2 ; Wang, Jian^1 ; Richard, Yuen^2

State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, China^1

Department of Architecture and Civil Engineering, City University of Hong Kong, Hong Kong, Hong Kong^2

关键词: Ceiling height;    Combustion pro-cess;    Cone calorimeter;    Heat feedback;    Heat Release Rate (HRR);    Linear relationships;    n-Heptanes;    Pool fires;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/67/1/012010/pdf
DOI  :  10.1088/1755-1315/67/1/012010

来源: IOP

【 摘 要 】

To investigate the influence of ceiling height on the combustion process of a pool fire whose flame impinges the ceiling, a sequence of pool fires with varying ceiling heights was performed using a scaled-down cone calorimeter. N-heptane and jet-A were employed as fuels to conducted the tests. Experimental findings reveal that with the decreasing ceiling height, the maximum and average heat release rates will initially increase due to the enhanced heat feedback, and then decrease as a result of the restriction of air entrainment caused by the extremely small ceiling height. In addition, the dimensionless ceiling height is found to have a linear relationship with the logarithm value of the dimensionless averaged heat release rate for the two given fuels with the similar slope of -2/3.