基于网格化热传导模型对高温防护服传热过程的研究

Research on Heat Transfer Process of High Temperature Protective Clothing Based on Mesh Heat Transfer Model

为了解决常见高温防护服装在性能和舒适度等方面面临的新问题,本文针对当前常见的一种热防护服,探究物理特性和导热过程。在研究中,建立了高温下的网格化热传导模型,该模型由4层防护材料构造的4个热传导方程组成,经过求解温度分布,得出了温度分布与时间和空间之间的联系;绘制出了数据曲线,并观察发现这种热防护服在环境温度为75℃情况下,经过1744s,温度开始平稳变化直至不变;计算得出人体模型皮肤的热传导率为0.0017W/(m·℃),并给出各材料层温度分布表(见表1),为更加先进的高温防护服的设计提供重要的计算规律和理论依据。

In order to solve the new problems in performance and comfort of common high temperature protective clothing, this paper explores the physical characteristics and heat conduction process of a common thermal protective clothing. In the study, a grid heat transfer model is established at high temperature, which is composed of four heat transfer equations constructed with four layers of protective materials. The relationship between temperature distribution and time and space is obtained by solving the temperature distribution. The data curve is drawn, and it is observed that the temperature of this thermal protective suit began to change steadily until it remained unchanged after 1744s at the ambient temperature of 75℃. The thermal conductivity of human model skin is calculated to be 0.0017w /(m·℃), and the temperature distribution table of each material layer is given (table 1), providing important calculation rules and theoretical basis for more advanced design of high-temperature protective clothing.