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首页> 外文期刊>Fire and materials >Study on different finite difference methods at skin interface for burn prediction in protective clothing evaluation
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Study on different finite difference methods at skin interface for burn prediction in protective clothing evaluation

机译：皮肤界面不同有限差分方法在防护服评估中燃烧预测的研究

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摘要

For protective clothing evaluation by using the flame engulfment method, a skin burn injury model is required to predict burn degree of the covered skin. By applying finite difference methods, 2 numerical methods are compared. One is based on equivalent heat intensity; the other is based on the law of conservation of energy. In this study, skin temperature rise is compared between these 2 methods by using homogeneous skin properties as well as the analytical solutions. Differences between these 2 methods in application of measured heat exposure tests data are also explored. The results show that assuming equivalent heat intensity at the skin layer interfaces overestimates severity of burn injury. Burn injury time is sensitive to the investigated numerical methods, especially for third-degree burns. The differences of the 2 methods can be reduced by optimization of the grid size using the test cases described in ASTM F1930. A detailed description of requirements regarding applicable numerical methods in future revisions of the relevant standards is recommended. The finite difference model applied in this paper can act as an effective tool to predict temperature distribution in the skin as well as predict burn injury for evaluation of thermal protective clothing.
机译：为了通过火焰吞噬法评估防护服，需要使用皮肤灼伤模型来预测被覆盖皮肤的灼伤程度。通过应用有限差分法，比较了两种数值方法。一种是基于等效热强度；另一种是基于等效热强度。另一种是基于能量守恒定律的。在这项研究中，通过使用均一的皮肤特性以及分析溶液，比较了这两种方法之间的皮肤温度升高。还探讨了这两种方法在测得的热暴露测试数据应用中的差异。结果表明，假设表皮层界面处的热量相等，则会高估烧伤的严重性。烧伤时间对研究的数值方法很敏感，尤其是对于三级烧伤。可以使用ASTM F1930中描述的测试案例通过优化网格大小来减少这两种方法的差异。建议对有关标准的未来修订版中适用的数值方法的要求进行详细说明。本文中使用的有限差分模型可作为预测皮肤温度分布以及预测烧伤伤害的有效工具，以评估热防护服。

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  • 来源
    《Fire and materials》 |2017年第8期|1027-1039|共13页
  • 作者

    Zhai L.; Camenzind M.; Li J.; Rossi R. M.;

  • 作者单位

    Donghua Univ, Coll Fash & Design, 1882 West Yan Rd, Shanghai 200051, Peoples R China|Swiss Fed Labs Mat Sci & Technol, Lab Biomimet Membranes & Text, Empa, CH-9014 St Gallen, Switzerland|Donghua Univ, Key Lab Clothing Design & Technol, Shanghai 200051, Peoples R China;

    Swiss Fed Labs Mat Sci & Technol, Lab Biomimet Membranes & Text, Empa, CH-9014 St Gallen, Switzerland;

    Donghua Univ, Coll Fash & Design, 1882 West Yan Rd, Shanghai 200051, Peoples R China|Donghua Univ, Key Lab Clothing Design & Technol, Shanghai 200051, Peoples R China|Shanghai Inst Design & Innovat, Shanghai 200092, Peoples R China;

    Swiss Fed Labs Mat Sci & Technol, Lab Biomimet Membranes & Text, Empa, CH-9014 St Gallen, Switzerland;

  • 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

    finite difference method; law of conservation of energy; protective clothing evaluation; skin burn injury; skin heat transfer;

    机译：有限差分法;能量守恒定律;防护服评估;烧伤;皮肤传热;

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