| 氦气渗透对高空长航时浮空器驻空能力影响 |
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| 引用本文： | 刘东旭,樊彦斌,马云鹏,吕明云.氦气渗透对高空长航时浮空器驻空能力影响[J].宇航学报,2010,31(11):2477-2482. |
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| 作者姓名： | 刘东旭 樊彦斌 马云鹏 吕明云 |
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| 作者单位： | 北京航空航天大学 航空科学与工程学院，北京 100191 |
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| 摘 要： | 氦气渗透率是浮空器蒙皮材料的重要设计指标之一，直接影响浮空器的运行时间和成本，决定高空浮空器能否实现长航时工作。以正球型浮空器为例，根据蒙皮材料薄壳受力特点得出浮空器体积与压差关系，建立了运动学模型和基于微孔损伤的氦气渗透模型，针对不同设计高度的正球型浮空器，结合浮空器内部氦气全天温度变化情况，分析了蒙皮材料渗透率对浮空器驻留高度、驻留时间等关键性能的影响，总结了渗透率、设计高度以及热力学特性之间的关系。
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| 关 键 词： | 渗透率 高度 蒙皮 损伤 浮空器 |
Effect of Helium Permeability on Working Endurance High Altitude Long Duration LTA Vehicle |
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| LIU Dong-xu,FAN Yan-bin,MA Yun-peng,LV Ming-yun.Effect of Helium Permeability on Working Endurance High Altitude Long Duration LTA Vehicle[J].Journal of Astronautics,2010,31(11):2477-2482. |
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| Authors: | LIU Dong-xu FAN Yan-bin MA Yun-peng LV Ming-yun |
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| Institution: | LIU Dong-xu,FAN Yan-bin,MA Yun-peng,LV Ming-yun(School of Aeronautic Science and Engineering,Beihang University,Beijing 100191,China) |
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| Abstract: | Helium permeability is one of key elements to design the envelope material of lighter-than-air vehicle(LTA),and affects the LTA runtime and costs,especially the high altitude LTA.A sphere LTA is analyzed as an example to estimate the effect of helium permeability.The relation between volume and differential pressure is deduced by the stressstrain characteristics of thin envelope.Based on the kinematics model,the micro-damnification model of helium permeability and change of the helium temperature changing i... |
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| Keywords: | Permeability Altitude Envelope Damnification LTA |
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