The Analysis and Estimation of the Plume Models in the Development of Fires;

Based on the selected Heskestad plume model,the time-dependent variation regularity of pressure differences between indoor and outdoor,smoke heights,upper layer smoke temperatures,and lower la.

The applicability of the different plume models was analyzed on the basis of the comparison between the calculated results and the experimental data.

With different plume and spill plume correlations, the temperature development of the enclosure and steel element were modeled, then the applicability of plume models and factors affecting the calculation were analyzed.

Based on fire plume models,the smoke temperature above the fire source at different heights was predicted for typical fire scenarios of Beijing National Stadium of Olympics 2008.

The whole study is done on the Boussinesq approximation and equation of fluent mechanics in hoping to develop a 3 dimensional model of plume.

Starting form the application of plume model in modeling traffic impact scope,the paper points out shortcomings of the application,modifies unreasonable content of analogical assumption,and then establishes a quantitative,practical model through reasonable assumption,which could determine traffic impact scope of a planned project.

Comparisons are done between puff model and segmented Gaussian plume model for different flow fields.