Thermographic phosphor thermometry in transient combustion: A theoretical study of heat transfer and accuracy

Thermographic phosphor thermometry in transient combustion: A theoretical study of heat transfer and accuracy
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瞬态燃烧中的热成像磷测温:传热和精度的理论研究

DOI:
10.1016/j.proci.2012.05.022
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发表时间:
2013
期刊:
影响因子:
--
通讯作者:
Dennis
Dennis
中科院分区:
--
文献类型:
--
作者:
Atakan;Roskosch;Dennis

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热成像荧光粉(TPS)用于研究燃烧环境中的壁面温度和热流密度。近年来,它们也被应用于内燃机等非稳态环境中,以研究墙体的换热。本研究从理论上考察了导致该方法局限性的一些相关影响因素,以帮助实验者选择合适的实验条件。首先研究了吸收率和薄膜厚度对吸收率的影响。然后研究了周围气相的非稳态热流密度随膜厚和电导率的变化,包括对TPS测量温度的影响。对典型情况下的温度测量误差和时间分辨误差进行了分析。最后研究了两种基材(石英和钢)的表面温度与膜厚之间的关系,这些基材分别涂有以硅酸镁或二氧化硅为代表的硅酸镁或二氧化硅。结果表明,在非稳态换热过程中,即使是相对较薄的层,表面最高温度也受到影响。
Thermographic phosphors (TPs) are used in combustion environments to study wall surface temperatures and heat fluxes. Recently they are also applied in unsteady environments like internal combustion engines to study the heat transfer to walls. The present study investigates theoretically some related effects leading to limitations of the method and thus trying to help experimenters to choose proper conditions for their experiments. The influence of absorptivity and film thickness is studied first. Then the unsteady heat flux of a surrounding gas phase is investigated as a function of film thickness and conductivity, including the effect on the temperatures which would be measured using TPs. The errors in temperature measurements and time resolution are investigated for typical cases. Finally the relation between the surface temperature and film thickness is investigated for combinations of two base materials (quartz and steel) coated with layers of Mg2SiO4or SiO2, as representatives for TP host materials. It is seen that the maximum surface temperature is influenced in unsteady heat transfer processes even by relatively thin layers.
溶胶-凝胶衍生红宝石的磷光特性测量为温度和 Cr3+ 含量的函数
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DOI: 10.1002/cvde.200606564
发表时间: 2007
影响因子: --
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