Transient Analysis of Fire-Induced Heat Transfer in Cylindrical Sealed Space
The main objective of the present work is an investigation of the heat transfer induced by the fire in a cylindrical sealed space. The thermal smoke flow geometry characteristics in cylindrical sealed space were discussed, LES and mixture fraction methods were applied to conduct numerical transient analysis. Computed results has validated the smoke flow course in simulation experiments. The study indicates that the heat transfer faster upper the fire source than around it. When the fire source location is near the wall, the smoke layer distributing were not distinct far from the fire source, and the heat transfer faster in transverse than longitudinal direction. Keywords—heat transfer , fire, cylindrical sealed space, numerical simulation.
Some Source-Dependent effects of unbounded fires
Abstract Measurements of time-mean axial velocity and temperature in simulated fires of low height to width ratio are reported. The flame length scales as Q 2 D 4 and the implications of this on earlier findings of the authors [4], with longer flame systems where length scales as Q 2 5 , are discussed. Empirical derivations of virtual source location for use in the plume equations above the flame tip are compared.
A note on smoke plumes from fires in multi-level shopping malls
It is shown that the experimental data obtained for plume flow in model-scale shopping malls can be correlated using equations similar to those developed by Yokoi. Further analysis is needed to establish the effective source of the plumes and the range of validity of the correlations developed. An alternative method of calculating mass flow above a balcony is suggested for interim use, until further analysis has been carried out.