模拟失重对人体皮肤温度分布和不同部位非蒸发散热的影响  

Effects of Head-down Bedrest on Surface Temperature Distribution and Non-evaporative Heat Dissipation.

作　　者：邱曼[1] 武建民[2] 顾鼎良[2] 虞学军[2] 袁修干[1] 陈景山[2] 

机构地区：[1]北京航空航天大学人-机-环境研究所,北京100083 [2]航天医学工程研究所,北京100094

出　　处：《航天医学与医学工程》2002年第2期93-99,共7页Space Medicine & Medical Engineering

摘　　要：目的研究模拟失重时人体体温调节系统的改变对人体非蒸发散热的影响。方法 5名被试者 - 6°头低位卧床 7d ,采用HR -Ⅱ型医用红外热像仪测量人体体表温度的分布 ,根据体表温度计算身体各部位的非蒸发散热量及其在总散热量中所占百分比例。结果卧床中 ,人体纵向温度梯度增加 ,在卧床第 3天 ,胸 -足部位皮肤温差较对照增加 6.7℃ ;各部位散热所占全身散热比例躯干增加了近 6% ,头部增加约 2 % ,上肢散热减少 3% ,下肢减少约 5 %。结论模拟失重条件下人体不同部位散热所占比例发生变化 ,这一结果可用于舱外航天服液冷层流量分配的设计。Objective To study the effect of simulated weightlessness on non evaporative heat dissipation from different parts of the human body. Method Body surface temperature distribution of five subjects was measured under -6° head down bedrest for 7 d with HR Ⅱ infrared thermography. Non evaporative heat dissipation was calculated with the heat exchange equations based on surface temperature. Result The temperature difference between torso and extremities increased during bed rest, and the largest was 6.7℃ higher than the control on the 3rd day of bed rest. The part of non evaporative heat dissipation from the torso increased about 6% and that from head neck increased 2%. At the same time, the parts of heat dissipation from the upper and lower extremities decreased about 3% and 5% respectively. Conclusion The parts of non evaporative heat dissipation from different areas of the human body changed during simulated weightlessness. This result provided a basis for the flow distribution design of liquid cooling garment of EVA suit.

关 键 词：失重模拟 体表温度 分布 非蒸发散热 液冷服 

分 类 号：R852.22[医药卫生—航空、航天与航海医学] R852.5[医药卫生—临床医学]