Research Of Garment's Thermal Resistance And Moisture Resistance Measurement Based On Active Sweating Manikin

The effects of four different wind speeds on the total and local heat and moisture resistance of the boundary air layer under isothermal and non-isothermal conditions are analyzed.In addition,the total evaporative resistance of clothing in four wearing states was measured under isothermal and non-isothermal conditions in this Paper,and the effects of different set values of sweating rate on the total evaporative resistance,local evaporative resistance,total evaporation sweating rate and local evaporation perspiration rate of clothing were analyzed.The sweating rate of different curvature Parts was comPared,and the difference between real human body sweating rate and manikin evaporation perspiration rate was comPared.The conclusions are as follows.(1)Under isothermal condition,the moisture resistance of boundary air layer in naked state is less affected by sweating rate and can be maintained in a relatively stable state.On the whole,the moisture resistance value is larger in the range of 400 g/h.m~2-500 g/h.m~2.This is because when the sweating rate is small,the local Part is dry,which reduces the local heat supply and increases the wet resistance.The sweating rate is set at 600g/h.m~2-800g/h.m~2 and the dampness resistance can be maintained at a relatively stable level.At this point,the skin clothing is completely wet,and the skin clothing is saturated with water vapor.Effective sweating zone to water saturation.The moisture resistance is small in the range of 900g/h.m~2-1000g/h.m~2,which is because excessive sweating causes sweat to precipitate out of the skin garment,and the excess water is immersed in the clothing under test,which reduces the water vapor pressure difference between the inner and outer layers of the garment and decreases the wet resistance value.The thicker wet resistance of clothing is affected by sweating rate,and the wet resistance decreases with the increase of sweating rate.(2)Under non-isothermal conditions,the moisture resistance of the boundary air layer in the nude state is relatively stable in the range of 600g/h.m~2 800g/h.m~2.On the whole,the wet resistance is unstable in the range of 400g/h.m~2 to 600g/h.m~2.The moisture resistance in the range of 600g/h.m~2-1000g/h.m~2 can be maintained at a relatively stable level.The order of humidity resistance from small to large is naked wet resistance,warm underwear resistance,even clothing humidity resistance value,and wearing two sets of clothing humidity resistance at the same time.(3)Under the four kinds of dress condition,the equal temperature humidity resistance is higher than the non-isothermal humidity resistance.The order of the humidity resistance value from small to big is the naked wet resistance,the warm underwear resistance,the body clothing humidity resistance value.The sum of wet resistance of warm underwear and joint-wear is greater than that of wearing two sets of clothes at the same time.The order of wet resistance from small to large is leg,arm,chest and back,waist and hip.(4)The perspiration rate of the dummy's chest is slightly higher than that of the real human body,and the rate of back perspiration is slightly smaller than that of the real human body.The rate of the dummy's evaporative sweating and the real human's sweating rate both decrease with the increase of temperature.(5)The total heat and humidity resistance and the heat and humidity resistance of all Parts decrease with the increase of the wind speed,and the decrease range of the heat and humidity resistance is the largest when the wind speed is 1m/s.(6)The stability of perspiration dummy is not very high,such as the isothermal condition of the sweating rate in the 900-1000g/(h.m~2)nude wet resistance increases with the sweating rate increased,dress state wet resistance decreases with increasing sweating rate.Under non-isothermal conditions,both the nude wet resistance and the wearing wet resistance appear to be the lowest point and continue to increase.Under ideal conditions,as the sweat rate increases from small to large,the sweat rate when the wet resistance reaches a minimum is a dummy.The minimum sweat rate,then the wet resistance value should remain unchanged.