CFD-based analysis of deviations between thermocouple measurements and local gas temperatures during the cooling phase of compartment fires

IF 3.4 3区 工程技术 Q2 ENGINEERING, CIVIL
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引用次数: 0

Abstract

Data from thermocouple (TC) measurements play a pivotal role in fire safety science and engineering studies. It is well-known that there are deviations from the actual local gas temperature and many studies have led to the development of correction factors. The present study focuses on these deviations inside compartments through a systematic series of CFD simulations, performed with Fire Dynamics Simulator (FDS), version 6.8.0. A canonical cubic box is used as geometry. This allows for the demonstration of the impact of the presence of smoke, with variable optical thickness, on the TC data as retrieved from FDS. Significant differences are observed between TC measurements and local gas temperatures. Corrections as developed for TC measurements in open atmospheres cannot be readily applied in compartment configurations, where smoke properties change both spatially and temporally.
基于 CFD 的车厢火灾冷却阶段热电偶测量值与局部气体温度之间的偏差分析
热电偶 (TC) 测量数据在消防安全科学和工程研究中发挥着举足轻重的作用。众所周知,当地气体温度与实际温度存在偏差,因此许多研究都开发了校正系数。本研究通过使用火灾动力学模拟器(FDS)6.8.0 版进行一系列系统的 CFD 模拟,重点研究隔间内的这些偏差。模拟使用了一个典型的立方体盒子作为几何体。这样就可以证明存在不同光学厚度的烟雾对从 FDS 获取的 TC 数据的影响。TC 测量值与当地气体温度之间存在显著差异。为开放大气中的 TC 测量而开发的校正方法不能轻易应用于隔室配置中,因为烟雾特性在空间和时间上都会发生变化。
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来源期刊
Fire Safety Journal
Fire Safety Journal 工程技术-材料科学:综合
CiteScore
5.70
自引率
9.70%
发文量
153
审稿时长
60 days
期刊介绍: Fire Safety Journal is the leading publication dealing with all aspects of fire safety engineering. Its scope is purposefully wide, as it is deemed important to encourage papers from all sources within this multidisciplinary subject, thus providing a forum for its further development as a distinct engineering discipline. This is an essential step towards gaining a status equal to that enjoyed by the other engineering disciplines.
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