Operators in thermal hazardous environments are more susceptible to burns during physical motion due to the potential deformation of thermal protective clothing. To study the influence of fabric deformation on heat transfer, a model of a three-layer thermal protective fabric system with stretching and compression deformation throughout the heat exposure and cooling phases was established and coupled with a skin heat transfer model to predict skin burns. Changes in the thermophysical properties of the fabric with deformation and skin tissue based on body location were considered. To verify the accuracy of the model, a modified radiant protective performance tester capable of simulating fabric deformation was applied. The relative error between the prediction results of the model and the experimental results does not exceed 4.68 %. The results demonstrate that stretching or compression deformation of the fabric increases heat transfer to the skin, and compression deformation generates a greater thermal hazard by accelerating the discharge of stored energy. Fabric deformation accelerates skin burns in all body parts, especially in the arms and legs. The findings of this research can provide a theoretical basis for understanding the frequent occurrence of skin burns associated with body motion and provide guidance for the design of thermal protective clothing to enhance the partial thermal protective performance.

中文翻译：

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热防护织物变形对热辐射热向人体皮肤传热影响的数值研究

由于热防护服可能变形，处于热危险环境中的操作员在身体运动时更容易被烧伤。为了研究织物变形对传热的影响，建立了在整个热暴露和冷却阶段具有拉伸和压缩变形的三层热防护织物系统模型，并与皮肤传热模型相结合来预测皮肤烧伤。考虑了织物的热物理特性随着变形和基于身体位置的皮肤组织的变化。为了验证模型的准确性，应用了能够模拟织物变形的改进型辐射防护性能测试仪。模型预测结果与实验结果相对误差不超过4.68%。结果表明，织物的拉伸或压缩变形会增加向皮肤的热传递，而压缩变形会加速储存能量的释放，从而产生更大的热危害。织物变形会加速身体所有部位的皮肤烧伤，尤其是手臂和腿部。该研究结果可为理解与身体运动相关的皮肤烧伤的频繁发生提供理论依据，并为热防护服的设计以增强局部热防护性能提供指导。