STEEL COLUMN THERMAL ANALYSIS UNDER LOCALIZED FIRE CONDITION CONSIDERING FLOW INFLUENCE

The computational fluid dynamics (CFD) method is used to analyze the localized fire condition where the brazier is adjacent to a steel column, and the consideration of horizontal flow is taken into account. In order to verify the correctness of the numerical simulation method, the ceiling jet model was thusly taken as an example to conduct a fire analysis under the condition of no wind at first, and the correctness of the numerical model was verified by comparison with the experimental data. In the thermal analysis of steel column near the brazier, it is found that the flame is obviously inclined under the influence of incoming flow. When the incoming flow velocity is greater than the critical value, the fire plume surrounds the steel column from the side surfaces, forming the scene of fire plume around the column, which leads to significant changes in the thermal characteristics of the fluid field and the heating condition of the steel column surfaces. The distribution rules of gas temperature field, of velocity field, of steel column wall temperature field and, of convective heat transfer coefficient are discussed in detail.