风速、湿度及汗湿量对服装热阻影响的试验

Experiments on the Influence of Ambient Wind Speed,Humidity and Sweat Amount on Thermal Resistance of Clothing

风速、湿度及汗湿量对服装热阻有重要的影响,为了研究风速、湿度及汗湿量与服装热阻的关系,本文研究服装热阻的测定方法、计算方法及服装在人与环境的热交换中的计算模型,并借助自制暖体假人试验平台,选取矿工服面料和绒衣,分别在不同风速、湿度及汗湿量的状态下进行了服装热阻的测定试验.结果表明:相对湿度、风速及服装汗湿量均与服装热阻呈负相关;表面热阻(I_(a))与风速(v)的关系表达式:I_(a)=0.07002 v^(-0.47435);当风速为1.5 m·s^(-1),表面热阻为0.058 m^(2)·℃·W^(-1),风流开始破坏边界层的难度增加,服装热阻出现拐点.

The wind speed,humidity and sweat moisture have important influences on the thermal resistance of clothing.In order to study the relationship between wind speed,humidity,sweat and heat resistance of clothing,this paper studies the measurement and calculation method of clothing thermal resistance and the calculation model of clothing in the heat exchange between people and the environment.With the help of the self-made thermal dummy experimental platform,the miner’s clothing fabric and fleece are selected to measure the thermal resistance of clothing under different wind speeds,humidity and sweat volume.Results show that relative humidity,wind speed and clothing sweat amount are all negatively correlated with clothing thermal resistance;the relationship between surface thermal resistance(I_(a))and wind speed(v):I_(a)=0.07002 v^(-0.47435);When the wind speed is 1.5 m·s^(-1),the surface thermal resistance is 0.058 m^(2)·℃·W^(-1).It is more difficult for the wind flow to destroy the boundary layer,and the thermal resistance of the clothing has an inflection point.