当前位置: X-MOL 学术Fire Mater. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
A new approach based on the modified FDS to numerically simulate cardboard box combustion under low pressure
Fire and Materials ( IF 1.9 ) Pub Date : 2019-11-13 , DOI: 10.1002/fam.2768
Rui Zhou 1, 2 , Han Zhao 1, 2 , Junjian Ye 1, 2 , Hui Zhang 1, 2
Affiliation  

To solve the limitation of the fire test in high‐altitude areas only detecting a limited number of low‐pressure environments, in this paper, appropriate modifications of the FDS source codes were made to generate a new simulator program for low‐pressure applications. Standard fire experiments with different counts (1, 2, 18, and 27) of cardboard boxes were numerically simulated under different pressure levels (101, 90, 75, and 64 kPa). The computation data show consistent trends with the experimental results obtained in the low‐pressure tank at Lang Fang. Furthermore, the simulation results have been examined to show typical quantitative relationships: (a) The peak mass burning rate divided by the fire base dimension is correlated with the product of the pressure squared and the combustible characteristic length cubed. The exponential indices for the 1‐box fire, 18‐box fire, and 27‐box fire are 0.31, 0.29, and 0.29, respectively. (b) The heat release rate and mass burning rate show a good linearity at each fixed environmental pressure. In conclusion, the modified FDS is validated to work well under low‐pressure conditions, which can provide a receivable means to conduct low‐pressure fire simulation and analysis.

中文翻译:

基于改进的FDS的数字方法在低压下对纸板箱燃烧进行数值模拟的新方法

为了解决仅检测有限数量的低压环境在高海拔地区进行防火测试的局限性,本文对FDS源代码进行了适当的修改,以生成适用于低压应用的新模拟器程序。在不同的压力水平(101、90、75和64 kPa)下,对具有不同数量(1、2、18和27)纸箱的标准火灾实验进行了数值模拟。计算数据显示与朗芳低压罐获得的实验结果一致的趋势。此外,已经检查了模拟结果以显示典型的定量关系:(a)峰值燃烧速率除以火基尺寸与压力平方与可燃特征长度立方的乘积相关。1盒射击,18盒射击和27盒射击的指数指数分别为0.31、0.29和0.29。(b)在每个固定的环境压力下,放热率和质量燃烧率均显示出良好的线性。总之,经过验证的改进型FDS在低压条件下可以很好地工作,这可以为进行低压火灾模拟和分析提供一种可接收的手段。
更新日期:2019-11-13
down
wechat
bug