空间飞行器防结露舱壁的轻量化分析

发布时间：2018-02-13 13:28

本文关键词： 飞船舱结露通风热绝缘轻量化　出处：《航天医学与医学工程》2000年06期 　论文类型：期刊论文

【摘要】：目的研究采用隔热及通风的防结露措施后空间飞行器密封舱壁的质量构成特点 ,为舱壁的轻量化设计提供依据。方法建立了舱壁传热过程的物理数学模型和质量构成模型 ,对结露临界工况下影响质量增量的几个因素进行了分析。结果在其它条件不变时 ,随着通风量的增加 ,系统的质量增量会先减小然后增大 ,存在最小值及相应的临界通风量。找出了通风量、隔热层表面黑度及隔热层导热系数对质量增量的影响规律以及露点变化的影响。结论较小的隔热层导热系数 ,较低的外表面黑度和较高的内表面黑度 ,均有利于舱壁质量增量的降低。
[Abstract]:Aim to study the characteristics of mass composition of sealed bulkhead of space vehicle after using heat insulation and ventilation to prevent condensation, and to provide basis for lightweight design of bulkhead. Methods physical mathematical model and mass constitution model of heat transfer process of bulkhead are established. Several factors affecting mass increment under the critical condition of condensation are analyzed. The results show that the mass increment of the system decreases first and then increases with the increase of ventilation when other conditions are not changed. There is a minimum value and corresponding critical ventilation. The effects of ventilation rate, surface blackness and thermal conductivity of heat insulation layer on mass increment and the variation of dew point are found. Lower outer surface blackness and higher inner surface blackness are beneficial to the decrease of bulkhead mass increment.
【作者单位】：清华大学工程力学系!北京100084 清华大学工程力学系!北京100084 清华大学工程力学系!北京100084 清华大学工程力学系!北京100084
【分类号】：R85

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