摘要
平流层飞艇是一种依靠主气囊充满轻于空气的气体的浮力在18～24km高空工作的重要的低速近空间飞行器,飞艇囊体气密层材料的气体阻隔性能特别是对氦气的阻隔性能是确保平流层飞艇正常工作和延长驻空时间的关键技术。在介绍飞艇气囊工作原理的基础上,分析了平流层飞艇对囊体材料性能的要求,重点分析了对组成层压结构囊体的气密层材料的性能要求和选材依据,并对气体透过聚合物薄膜的一般过程和机理进行了阐述。详细归纳了国内外对用做浮空气体的氦气透过聚合物的研究现状,指出高阻隔气密层材料的国产化是中国发展平流层飞艇所面临的一个瓶颈问题。
Stratospheric airship is a low-speed near space aerocraft which floats at an altitude of 18-24 km above the earth depending on the lifting gas filled in the hull envelope. The impermeability of gases in the retention layer is the key technology for the normal operation of the airship. In this article, based on an introduction to the operational principles of the airship, the requircments of envelope materials are first analyzed, especially its gas retention layer. Then, the gas permeation process is explained, and research about the permeability of helium through polymers is summarized. Finally, the article indicates that increasing the barrier property of polymer materials is the most important problem of developing stratospheric airships in China.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2009年第9期1761-1768,共8页
Acta Aeronautica et Astronautica Sinica
关键词
平流层飞艇
气密层
氦气
气体透过
聚合物
stratospheric airship
gas retention layer
helium
gas permeation
polymers
