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Thermal conductivity of intumescent coating char after accelerated aging

机译:加速老化后膨胀型炭的导热系数

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摘要

This paper presents the results of an experimental and numerical simulation study to obtain thermal conductivity of intumescent coating after accelerated aging. Two types of intumescent coating were used. The main objective of this research was to check the accuracy of a thermal conductivity model for the fully expanded intumescent coating char, which was assumed to depend on the expansion thickness and the bubble size and distribution. By using the model and the measured expanded thicknesses and average bubble diameters for the two types of intumescent coating after different cycles of accelerated aging, the intumescent coating insulated steel plate temperatures were numerically calculated and compared with measured results. The agreement has been found to be generally satisfactory, suggesting that the thermal conductivity model is acceptable. The measured results of intumescent coating expanded thickness and bubble size show that aging has two detrimental effects on the insulation performance of intumescent coating: reducing the expansion thickness and increasing the bubble size, both leading to increased thermal conductivity.
机译:本文介绍了通过实验和数值模拟研究得出的结果,以获取加速老化后膨胀型涂层的导热系数。使用了两种类型的膨胀型涂料。这项研究的主要目的是检查完全膨胀的膨胀型涂层炭的导热系数模型的准确性,假定该模型取决于膨胀厚度以及气泡尺寸和分布。通过使用该模型并测量两种类型的膨胀涂层在不同的加速老化循环后的膨胀厚度和平均气泡直径,对膨胀涂层绝缘钢板的温度进行了数值计算,并与测量结果进行了比较。已经发现该协议通常是令人满意的,这表明热导率模型是可以接受的。膨胀型涂料膨胀厚度和气泡尺寸的测量结果表明,老化对膨胀型涂料的绝缘性能有两个不利影响:减小膨胀厚度和增大气泡尺寸,都导致导热系数的增加。

著录项

  • 来源
    《Fire and materials》 |2013年第6期|440-456|共17页
  • 作者单位

    College of Civil Engineering, Tongji University, Shanghai, China;

    College of Civil Engineering, Tongji University, Shanghai, China,School of Mechanical, Aerospace and Civil Engineering, University of Manchester, Manchester, U.K;

    School of Mechanical, Aerospace and Civil Engineering, University of Manchester, Manchester, U.K;

    College of Civil Engineering, Tongji University, Shanghai, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    intumescent coating; expansion thickness; bubble size; thermal conductivity model; accelerated aging test;

    机译:膨胀型涂料;膨胀厚度气泡大小;导热系数模型加速老化测试;
  • 入库时间 2022-08-18 00:11:17

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