Simulation of an experimental compartment fire by CFD
Simulation of an experimental compartment fire by CFD
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DOI：
10.1016/j.buildenv.2006.08.002
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发表时间：
2007-09
影响因子：
7.4
通讯作者：
Raunaq Hasib;Rajiv Kumar;Shashi;Surendra Kumar
中科院分区：
文献类型：
--
作者：
Raunaq Hasib;Rajiv Kumar;Shashi;Surendra Kumar
本文分析了室内火灾实验[Kumar R.研究室内火灾。博士论文印度理工学院，鲁尔基，2004年]，使用CFD建模。实验在燃烧甲醇作为燃料的隔室中进行。在三种大小的火灾中，记录了车厢内11个不同位置的温度与时间的关系。CFX-5.7.1 [CFX 5.7.1，ANSYS，Inc.，275 Technology Drive，Canonsburg，PA 15317，2005]是用于分析的软件包。早期的CFX已经用Steckler等人的实验数据进行了验证[NBSIR 82-2520.国家标准局，华盛顿，DC，1982]关于隔间火灾。然而，这种验证是针对稳定的火灾。在目前的工作中，验证了增长火灾在过渡时期。在选定的位置随时间的温度的预测与实验结果符合得很好。此外，在门中心线处的速度水平分量的预测轮廓与通常的假设一致，在区域模型中，中性面存在于门的中间高度附近。在该平面上方，热气体离开隔室，而在该平面下方，新鲜空气从外部进入隔室。我们认为，CFX虽然是通用CFD软件，但可以应用于复杂的火灾场景进行分析，并制定消防安全法规。
This paper analyses the experimental results, obtained in a compartment fire experiment [Kumar R. Studies on compartment fires. Ph.D. thesis. Indian Institute of Technology, Roorkee, 2004], by using CFD modelling. Experiments were conducted in a compartment by burning methanol as a fuel. Temperatures vs. time were recorded at 11 different locations in the compartment for three sizes of fires. CFX-5.7.1 [CFX 5.7.1, ANSYS, Inc., 275 Technology Drive, Canonsburg, PA 15317, 2005] is the software package used for the analysis. Earlier CFX has been validated with the experimental data of Steckler et al. [NBSIR 82-2520. National Bureau of Standards, Washington, DC, 1982] on compartment fires. However, this validation was for steady fires. In the present work validation has been done for growing fires during transient period. The predictions of temperatures with time at selected locations are in good agreement with the experimental results. Further the predicted profile of horizontal component of velocity at the door centreline is in agreement with usual assumption, made in zone models that the neutral plane exists at about the door mid height. Above this plane the hot gases leave the compartment, while below it fresh air enters into the compartment from the outside. It is our view that the CFX, though being general purpose CFD software, may be applied to complex fire scenarios for the analysis, and developing fire safety regulations.