中庭火灾烟流相似模型

将燃烧着的火焰视为具有一定发热量的热源、不计辐射传热的影响 ,建立中庭火灾烟气流动控制微分方程组 ,并导出模型实验相似准则 ;提出模型与原型局部相似的模型律 ;忽略围护结构热相似 ,建立 1/ 8模型试验台 ;开展中庭火灾烟流填充过程模型实验 ,模型实验与原型实验结果吻合。研究表明 :理论模型律是合理的 ,采用小比例的相似模型实验 ,研究中庭火灾烟流的发展是可行的

A Scaling Model for Smoke Flow in Atrium Fires

Take the combusting fire flame as a heat source containing certain amount of latent heat, and ignore the effect of radiation heat. The governing differential equation groups for smoke flow in atrium fire were established, from which dimensionless groups were derived. A subset of dimensionless group was identified significant in establishing the scaling criteria for maintaining partial dynamic scaling between the model and prototype experiments. Since the similarity of heat transfer at solid boundaries was neglected, a corresponding model was set under 1/8 geometric scale. The corresponding experiment on smoke filling processes in an atrium model was done and good results were achieved between the model and prototype for smoke filling. It showed that the theoretical scaling criteria were reasonable, and the approach used to study the spread and growth of atrium fire using small-scale model experiment was practicable.