多房间建筑室内火灾数值模型的验证

On the experimental validation of the numerical simulation for multi compartment fires

介绍单层多房间建筑室内火灾数值模拟的验证研究。模型的计算值与 L uo和 Beck的实验结果进行了比较。为了考虑火灾的燃烧过程 ,采用 L aminar Flamelet方法。多房间建筑内热辐射的计算则使用 DOM(discret ordinates method)方法。在验证工作中 ,最困难的工作是通风不良条件下火灾的模拟。由于在低含氧量的情况下 ,火焰的燃烧特性并没有得到很好的认识 ,因此对燃烧模型并没有引入任何的修改 ,以便保留处理燃烧过程方法的通用性以及便于检验 L aminar Flamelet燃烧模型的能力。模拟结果与 L uo和 Beck的实验值能很好吻合。

Reports a validation study of a CFD simulation for an enclosure fire in a single level multi room building. Model predictions are compared against experimental results of Luo and Beck. It focuses on the use of laminar flamelet approach to account for the combustion of fire. Global radiation in the multi compartment building is evaluated though the discrete ordinates method. The challenging task in this validation exercise is the simulation of a fire in an under ventilated condition. Since the burning characteristics of a fire under low oxygen concentrations are not well understood, we did not introduce any modifications to the combustion model in order to retain the general approach to the handling of the combustion processes and test the capability of the flamelet combustion model. Generally, our results are in good agreement with Luo and Beck measured results.