论文信息 - Heating Mechanism of Building Components Exposed to a Localized Fire

Heating Mechanism of Building Components Exposed to a Localized Fire

A prediction of the thermal response of a steel beam installed beneath a ceiling and exposed to a localized fire source was performed by using CFD model. The validity of this calculation has been verified by results of experiments. Concerning the heat flux, the difference between analytical results and experimental values increases with increasing dimensionless heat release rate QHB*≡Q/ρCPT0 g1/2HB5/2. In the case of the lower flange, the difference between the analytical result and experimental value increases rapidly over the range of QHB* from 0.3 to 0.5, reaching the maximum value of about 27(kW/m²). From the results of the investigation, it has become clear that the prediction is possible with a practical accuracy about the convection part of heat transfer. However, it is necessary to model minutely about combustion and radiation.

[1] Soonil Nam,et al. Numerical simulation of thermal plumes , 1993 .

[2] R. Wei,et al. CFD Analysis of Fire Plume : Part1 Influence of Computational Domain and Mesh Divion on Numerical solution , 1998 .

[3] Y. Hasemi,et al. EXPERIMENTAL STUDY ON THE HEATING MECHANISM AND THERMAL RESPONSE OF A STEEL BEAM UNDER CEILING EXPOSED TO LOCALIZED FIRES , 1997 .

[4] Wan Ki Chow,et al. A Study Of The Fire Aspect Of Atria In Hong Kong , 1991 .

[5] P. A. Rubini,et al. CFD prediction of coupled radiation heat transfer and soot production in turbulent flames , 1996 .

[6] P. A. Rubini,et al. Assessment of a differential total absorptivity solution to the radiative transfer equation as applied in the discrete transfer radiation model , 1996 .

[7] T. Hara,et al. Analysis of Thermal Plumes with Numerical Simulation and Experimental Results : Basic Plume Analyses for the CFD Performance of the Standard k-εModel , 1998 .