舱内失压下航天员热舒适度和散热量仿真

针对载人登月舱内失压应急返回过程中,不同条件下航天员穿着舱外航天服维持生存时的热舒适度问题,基于Matlab建立了人-航天服热模型。其中人体热模型基于Fiala模型建立,航天服热模型使用集总参数法建立。经过不同工况的对比,仿真结果与文献数据基本吻合,验证了模型的正确性。在此基础上,基于DTS热舒适度计算方法对不同失压紧急情况下的人体热舒适度进行了分析,得到了舱内不同环境下人体热舒适度、航天服所需散热量和通风气体湿度的变化规律,并提出了系统优化方案,为我国应急舱内压力防护系统的设计和生保方案制定提供了参考。

Simulation of Astronaut Thermal Comfort and Heat Dissipation under Cabin Pressure Loss Condition

Aiming at the problem of thermal comfort of astronauts wearing space suits for survival in different conditions during the emergency return process with cabin pressure loss, a human space suit thermal model is established based on Matlab. The human thermal model is established based on the Fiala model, and the space suit thermal model is established by the lumped parameter method. The simulation results of the human space suit thermal model in different working conditions are in agreement with the data in literature, and the correctness of the model is verified. On this basis, the human body thermal comfort under different pressure loss conditions is analyzed based on the DTS thermal comfort algorithm, the relation among human thermal comfort, heat dissipation and ventilation gas humidity is obtained, and the proposals to optimize the system are put forward. The model and its simulation results can provide references for the design of cabin pressure protection system and the establishment of astronauts life support scheme in China.