增阻离轨技术是指充分利用稀薄流气动阻力、在寿命末期航天器上展开大展收比增阻装置,从而大幅加速其轨道衰减的被动离轨技术。增阻离轨装置在稀薄流中的气动特性参数是预测离轨周期的关键参数,本文采用直接模拟蒙特卡罗方法(DSMC)对增阻离轨装置在稀薄流下的气动特性进行了数值预测,为后续航天器离轨动力学分析计算提供依据。
The drag-enhancing deorbit technology refers to the passive deorbiting technology which makes the most use of atmosphere drag of rarefied gas to greatly accelerate the orbit decay of the end-of-life spacecraft by utilization of drag device with large deployment ratio.The aerodynamic coefficients of the drag-enhancing deorbit device in rarefied flow are key parameters for predicting the time of deorbit process.The DSMC method is employed to carry out the computation of the aerodynamic characteristics of the drag-enhancing deorbit device in free molecular flows,which provides a basis for the subsequent calculation of the spacecraft deorbiting dynamics.
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