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首页> 外文期刊>International Journal of Heat and Mass Transfer >A novel approach to temperature-dependent total emissivity estimation based on isothermal cooling
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A novel approach to temperature-dependent total emissivity estimation based on isothermal cooling

机译：基于等温冷却的温度相关总发射率估算的新方法

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摘要

This paper proposes a novel approach to estimate the temperature-dependent total emissivity based on the isothermal cooling process. The realizability of the ideal isothermal cooling phase has been verified through the finite-element model, even for specimens with low thermal conductivity. During the cooling process, the temperature difference of the specimen can be less than 0.8%. Moreover, based on the temperature curve of isothermal cooling, nonlinear total emissivity can be calculated using the inverse method over a broad temperature range, e.g., 500-1200 K, and the relative errors will be less than 8.83% with virtual test data. For a real-world application, we introduce the Savitzky-Golay (SG) filter to weaken the effect of noise on computation precision and successfully gain the smooth temperature-dependent total emissivity. (C) 2018 Published by Elsevier Ltd.
机译：本文提出了一种基于等温冷却过程估算温度相关总发射率的新颖方法。理想的等温冷却阶段的可实现性已经通过有限元模型进行了验证，即使对于低导热率的样品也是如此。在冷却过程中，样品的温差可以小于0.8％。此外，基于等温冷却的温度曲线，可以使用逆方法在较宽的温度范围（例如500-1200 K）中使用非线性方法计算非线性总发射率，并且使用虚拟测试数据，相对误差将小于8.83％。对于实际应用，我们引入了Savitzky-Golay（SG）滤波器来减弱噪声对计算精度的影响，并成功获得与温度相关的平滑总发射率。 （C）2018由Elsevier Ltd.发布

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  • 来源
  • 作者

    Peng Zujun; Xie Weihua; Meng Songhe; Pan Weizhen; Du Shanyi;

  • 作者单位

    Harbin Inst Technol, Sci & Technol Adv Composites Special Environm Lab, Bldg A Sci Pk HIT,2 Yi Kuang St, Harbin 150001, Heilongjiang, Peoples R China;

    Harbin Inst Technol, Sci & Technol Adv Composites Special Environm Lab, Bldg A Sci Pk HIT,2 Yi Kuang St, Harbin 150001, Heilongjiang, Peoples R China;

    Harbin Inst Technol, Sci & Technol Adv Composites Special Environm Lab, Bldg A Sci Pk HIT,2 Yi Kuang St, Harbin 150001, Heilongjiang, Peoples R China;

    Harbin Inst Technol, Sci & Technol Adv Composites Special Environm Lab, Bldg A Sci Pk HIT,2 Yi Kuang St, Harbin 150001, Heilongjiang, Peoples R China;

    Harbin Inst Technol, Sci & Technol Adv Composites Special Environm Lab, Bldg A Sci Pk HIT,2 Yi Kuang St, Harbin 150001, Heilongjiang, Peoples R China;

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

    Total emissivity; Temperature-dependent; Laser heating; Isothermal cooling;

    机译：总发射率;温度依赖性;激光加热;等温冷却;

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