Abstract
The impacts of elevation on fires in a ceiling vented compartment were investigated experimentally. The flame behavior of elevated fires was recorded. Various parameters including the fuel mass loss rate, the light extinction coefficient, the oxygen concentration and the gas temperature were measured. Results indicated that the variations of the flame behavior were consistent with that of the fuel mass loss rate. The fire location significantly impacted the light extinction coefficient, the oxygen concentration and the gas temperature, which all showed distinct stratification phenomena. For a higher elevated fire, the average fuel loss rate and the overall light extinction coefficient were smaller, the oxygen concentration was higher and the gas temperature was lower. In addition, the smoke descending was slower. From the perspective of those parameters the fire was less hazardous if the fire was elevated higher, which was totally different from the elevated fires in closed compartments.
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The present work was supported by National Natural Science Foundation of China (Project no. 50976109 and no. 51206157), the Research Fund for the Doctoral Program of Higher Education of China (Grant no. 20123402110048), and a Grant from CityU (Project No. 7002577).
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Zhang, J., Lu, S., Li, Q. et al. Experimental study on elevated fires in a ceiling vented compartment. J. Therm. Sci. 22, 377–382 (2013). https://doi.org/10.1007/s11630-013-0639-5
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DOI: https://doi.org/10.1007/s11630-013-0639-5