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为了研究相变调温服的热防护性能,介绍了人体热调节模型,利用焓法建立了相变传热数学模型。在整个区域建立统一的能量方程,采用控制容积有限差分法对方程进行隐式离散,用追赶法求解方程组得到各节点的焓值,求出相变材料内表面的温度。通过相变调温服人体热调节模型,计算出人体的动态温度分布及出汗量。计算结果表明,核心温度的变化与试验结果相符,出汗量相差不大,所建相变传热模型合理可靠。通过比较人体穿着相变调温服和未穿该服装时的动态温度分布及出汗量,可以看到穿着相变调温服能显著地减轻人体的热负荷。
In order to study the thermal protection performance of phase change temperature control clothing, the thermal regulation model of human body was introduced and the mathematical model of phase change heat transfer was established by enthalpy method. In the whole region, a unified energy equation is established, and the governing volume finite difference method is used to implicitly discretize the equations. The enthalpy of each node is obtained by chasing the equations, and the temperature of the inner surface of the phase change material is obtained. Through the phase change temperature control service human body thermal regulation model to calculate the body’s dynamic temperature distribution and sweating volume. The calculation results show that the change of core temperature is in good agreement with the experimental result, and the difference of sweat volume is not large. The phase change heat transfer model built is reasonable and reliable. By comparing the body temperature change wearing temperature change clothing and not wearing the clothes when the temperature distribution and the amount of sweat, you can see the wearing phase change temperature clothing can significantly reduce the body’s heat load.