Phosphor thermometry for surface temperature measurements of composite materials during fire test

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Heat and Mass Transfer Pub Date : 2023-09-01 DOI:10.1016/j.ijheatmasstransfer.2023.124215

A Chaudhary , A Coppalle , G. Godard , P. Xavier , B. Vieille

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引用次数: 0

Abstract

This study presents the implementation of phosphor thermometry method to obtain pointwise surface temperature measurements of a carbon fibers reinforced polymers composite exposed to a flame. Phosphor thermometry has previously been used to measure surface temperature in relevant applications, mainly on metallic materials. In the present study, it has been applied to measure the backside temperature of a carbon fiber Poly Phenylene Sulfide (PPS) polymer composite exposed to a flame, in order to analyze the feasibility, the limits and the advantages of the method compared to infrared thermography. Mg₄FGeO₆:Mn⁴⁺ thermographic phosphor is coated on the back side of the composite sample and excited with a 10 Hz repetition rate Nd:YAG laser at 355 nm. The time-resolved phosphorescence signals are processed with the lifetime approach to determine the temperature. A coating of small thickness allows the surface temperature to be measured up to 400 °C, and it is shown that this coating has no effect on the heat exchange at the surface. The comparison between the phosphor thermometry results with the ones obtained with an infrared camera shows an interesting methodology to determine the infrared emissivity of the sample at high temperature.

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防火试验中复合材料表面温度测量用磷光体测温法

本研究提出了磷光体测温方法的实现，以获得暴露在火焰中的碳纤维增强聚合物复合材料的点表面温度测量。荧光粉测温已经在相关应用中用于测量表面温度，主要是在金属材料上。本研究将其应用于碳纤维聚苯硫醚(PPS)聚合物复合材料在火焰下的背面温度测量，以分析该方法的可行性、局限性以及与红外热成像相比的优势。在复合材料的背面涂覆Mg4FGeO6:Mn4+热成像荧光粉，用10hz重复频率Nd:YAG激光在355nm下激发。用寿命法处理时间分辨磷光信号以确定温度。小厚度的涂层可以测量到高达400°C的表面温度，并且表明该涂层对表面的热交换没有影响。将荧光体测温结果与红外摄像机测温结果进行比较，发现了一种测定样品高温下红外发射率的有趣方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Heat and Mass Transfer 工程技术-工程：机械

CiteScore

10.30

自引率

13.50%

发文量

1319

审稿时长

41 days

期刊介绍： International Journal of Heat and Mass Transfer is the vehicle for the exchange of basic ideas in heat and mass transfer between research workers and engineers throughout the world. It focuses on both analytical and experimental research, with an emphasis on contributions which increase the basic understanding of transfer processes and their application to engineering problems. Topics include: -New methods of measuring and/or correlating transport-property data -Energy engineering -Environmental applications of heat and/or mass transfer