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有限厚度碳化材料的垂直壁面向上火蔓延模型
Modeling Upward Flame Spread on a Charring Material Surface With Limited Thickness
【摘要】 研究了垂直壁面向上火蔓延过程受材料本身、壁面以及周围环境中的火源加热等因素的影响,建立了存在外加热情况下火焰沿胶合板材料表面蔓延的模型,模拟了该材料的垂直向上火蔓延随时间的变化过程.研究结果表明,火焰沿垂直平板表面上行的蔓延过程不是线性变化的,而是一个不断加速的过程,随着火蔓延时间的增加,外加热流的影响逐渐增大;当增加衬板导热系数时,火焰蔓延速率下降.
【Abstract】 In this paper, an upward flame spread model for plywood material which has a limited depth is presented. Using this model, the upward flame spread process for the plywood material with external heating flux is simulated. The numerical results of flame spread varying with time were obtained and analyzed when the external heating flux and the heat transfer coefficient of the wall were changed