真空环境下月壤颗粒受力影响因素及对空间分布的影响  

Study on Force-influencing Factors and Spatial Distribution of Lunar Regolith Particles under Vacuum Environment

作　　者：邵亦琪 崔玉红[1] 郑刚[1] 于伟[2] 任德鹏[2] 叶青[2] 

机构地区：[1]天津大学机械工程学院,天津300072 [2]中国空间技术研究院,北京100094

出　　处：《空间科学学报》2016年第1期1-11,共11页Chinese Journal of Space Science

基　　金：国家重点基础研究发展计划项目资助(2013CB035400)

摘　　要：针对登月着陆器下降过程中扬起的月壤颗粒与羽流场的相互作用问题,分析了月壤颗粒在羽流场中受力的主要影响因素,讨论了月壤颗粒受到的曳力、升力和重力计算公式及适用范围.通过量级分析对这三种力进行计算,分析了影响月壤颗粒运动及空间分布的主要作用力.通过对惯性修正因数f_I、表面滑移修正因数f_C和周围颗粒影响修正因数f_F相关颗粒雷诺数、克努森数及孔隙率在羽流场中的分布进行计算,讨论了三种修正因数对月壤颗粒速度以及空间分布的影响.计算结果表明,f_I和f_F修正使得月壤颗粒纵向速度及扬起月壤颗粒的最高高度略有减小,而f_C修正对这两方面的影响并不明显.For the interaction between the regolith particles raised by lunar lander and plume, the main factors of regolith particles force in the plume are analyzed. The formula and scope of the drag, lift and gravity forces on regolith particles are also discussed. These forces were computed by magnitude analysis, and the main forces impacting the lunar soil particle motion and spatial distribution are analyzed. Particle Reynolds number, Knudsen number and the porosity, related to the inertia correction factor fI, surface slip correction factor fc and the correction factor fF affected by the surrounding particles, in the plume field distributions were calculated, and effects of the three correction factors of lunar soil particle velocity and spatial distribution are also discussed. Results show that the longitudinal velocity of lunar soft particles and the maximum height of the lunar regolith particles can raise decreases slightly after ）el and fF correction, while the impact of fc correction is not obvious.

关 键 词：月壤颗粒 影响因素 量级分析 曳力修正 

分 类 号：V476.3[航空宇航科学与技术—飞行器设计] V520