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首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >In-depth temperature measurements in wood exposed to intense radiant energy
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In-depth temperature measurements in wood exposed to intense radiant energy

机译：暴露于强辐射能的木材的深度温度测量

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Modern timber construction techniques rely on metallic connectors. Their failure during fires is related to shear failure, which can happen at lower temperatures than those leading to pyrolysis. Based on this information, a series of tests were carried out exposing wood specimens to various heat fluxes in a Cone Calorimeter on a vertical configuration with no pilot ignition and a normal air atmosphere. The aim of this investigation was to develop a dependable temperature measurement methodology in wood samples exposed to high heat fluxes and to build a data-base in order to assess different wood pyrolysis models. The experiments yielded highly repeatable results that are hard to achieve with wood, although at lower heat fluxes the repeatability was poorer. The data were then normalized using a simple, inert, heat transfer model. It will be used as a tool to assess the importance of different terms that are incorporated in models that predict in-depth temperature profiles for wood. The samples behaved almost like an inert solid when subjected to low heat fluxes. Poorer repeat ability at the lower levels of heat flux is justified by the beginning of pyrolytic reactions in wood at about 10 kW m(-2). (C) 2007 Elsevier Inc. All rights reserved.
机译：现代木材建造技术依赖于金属连接器。它们在火灾中的破坏与剪切破坏有关，剪切破坏的发生温度可能低于导致热解的温度。根据此信息，进行了一系列测试，这些测试是在没有热量点火且没有正常大气的垂直配置下，在锥形量热仪中将木材样品暴露于各种热流中。这项研究的目的是为暴露于高热通量的木材样品开发可靠的温度测量方法，并建立数据库以评估不同的木材热解模型。实验产生了高度可重复的结果，尽管木材在较低的热通量下可重复性较差，但很难用木材获得。然后使用简单的惰性传热模型对数据进行归一化。它将用作评估用于预测木材深度温度曲线的模型中所包含的不同术语的重要性的工具。样品在低热通量下的表现几乎类似于惰性固体。在大约10 kW m（-2）的木材中开始热解反应，证明了在较低热通量下重复能力较差。 （C）2007 Elsevier Inc.保留所有权利。

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