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为确保乘员安全性,载人航天器需通过氧分压控制系统将密封舱内的氧分压控制在指标范围内.提出了一种两舱段载人航天器密封舱氧分压控制系统数学模型,包括密封舱体、乘员、供氧组件、舱间通风(IMV)等多个子模块.通过与相关试验数据进行对比,证明了数学模型的准确性.针对由两个容积为60 m3密封舱组成的组合体,利用该模型分析了乘员驻留位置、舱间通风量、氧分压监测模式对两舱氧分压的影响.结果表明:当舱间通风量为0.5 m3/min且6人驻留在氧分压非主控舱时,两舱氧分压上限差别达到2.2 k Pa.两舱氧分压差别会随着舱间通风量的增加而减小.单舱监测模式和两舱监测模式对两舱氧分压影响并不显著,当舱间通风量超过1.5 m3/min时,两种控制模式的氧分压控制效果趋于一致.
In order to ensure the safety of occupants, the manned spacecraft needs the oxygen partial pressure control system to control the oxygen partial pressure in the sealed compartment within the index range.A mathematical model of oxygen partial pressure control system for two-compartment manned spacecraft sealed compartment Model, including a number of sub-modules, such as hermetic pods, crew members, oxygen supply modules, cabin ventilation (IMV), etc. The accuracy of the mathematical model is proved by comparison with the relevant experimental data.For two sub-modules, The model was used to analyze the effect of occupant’s position, ventilation volume and oxygen partial pressure monitoring mode on oxygen partial pressure in two compartments.The results showed that when the space ventilation volume was 0.5 m3 / min and 6 Residing in the oxygen partial pressure non-master control tank, the difference between the upper limit of oxygen partial pressure of the two tanks is 2.2 kPa. The difference of oxygen partial pressure of the two tanks will decrease as the ventilation volume of the two compartments increases. Single-tank monitoring mode and two tanks The monitoring mode has no significant effect on the oxygen partial pressure of the two compartments. When the space ventilation exceeds 1.5 m3 / min, the oxygen partial pressure control effects of the two control modes tend to be consistent.