中国空间科学技术

中国空间科学技术

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低轨恒速平板型轨道分子屏与大气的撞击作用

张华林,达道安   

  1. 兰州物理研究所
  • 发布日期:1997-12-25

IMPINGEMENT FORCES OF ATMOSPHERIC MOLECULES TO A FREEFLYING PLANE WAKE SHIELD FACILITY IN LOWEARTH ORBIT

Zhang Hualin Da Daoan(Lanzhou Institute of Physics,Lanzhou 730000))   

  • Online:1997-12-25

摘要： 以经典的气体分子运动论计算了低轨道（３００ｋｍ）恒速飞行的５ｍ直径平板型轨道分子屏所受的环境大气的撞击作用。大气分子和轨道分子屏的相互作用取完全弹性碰撞和完全非弹性碰撞这两种极端形式，由此可认为轨道分子屏所受的撞击作用就介于这两者之间。计算结果表明，六种主要的大气成分中，原子氧的撞击作用最大，约占总的撞击动量的８０％，Ａｒ的撞击作用最小，要比原子氧小４个数量级，作用于分子屏的总的作用力为０．０４１Ｎ～０．０８２Ｎ。这些数据将有助于更详尽的了解轨道分子屏在空间飞行时的行为。

关键词: 分子屏, 近地空间, 大气环境, 分子, 碰撞

Abstract: The impingement forces of atmospheric molecules to a freeflying plane wake shield facility(PWSF)in 300km lowearth orbit is investigated.Atmospheric gases are assumed Maxwellian gases.In our computation,the elastic and the complete inelastic collisions between atmospheric molecules and PWSF surfaccs are adopted to determine the impingement interactions.So,the real impingements are situated between the two interactions.Our results show that,for a 5m diameter PWSF in 300km orbit,the impingement force of the atomic oxygen(O) out of 6 main gas species is the greatest one,and the impingement force of argon(Ar)is the smallest one which is 4 orders of magnitude less than O's.The total force produced by the atmospheric molecules is less than 0082N