【摘要】 以腔室油池火模拟受限空间的轰燃过程,建立了无量纲的腔室油池火控制方程组,通过分析浮力模型的不足,提出用热释放速率定义特征速度,进而建立腔室油池火的尺度准则.结果表明,为保持实验的相似性,应保持油池尺寸随腔室高度的3/4次方增长关系成立;通过油池尺寸为30,cm、60,cm和120,cm 3种尺度的模拟实验对比,发现无量纲温度和无量纲质量燃烧速率曲线吻合较好,实验结果能较好地满足尺度关系.更多还原

【Abstract】 The process of flashover in a room was modeled using pool fire in a compartment.The dimensionless go-verning differential equations of pool fire in the compartment were established.By analyzing defect and deficiency of the buoyancy model,this paper obtained the scale criterion of pool fire in the compartment after characteristic veloci-ty was defined by heat release rate of fire source.It is concluded that,to maintain the similarity of experiments,pool fire scale should be kept in direct proportion to the 3/4th power of spatial scale;that the curves of dimensionless tem-perature coincide well with those of dimensionless mass burning rate,shown by the three scale experiments whose pool side lengths are 30 cm,60 cm and 120 cm,respectively.It is indicated that the results of simulation experiments agree well with the scale criterion.更多还原