中文摘要：

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，fI、表面滑移修正因数，fc和周围颗粒影响修正因数，fF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，fI和，fF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fC修正对这两方面的影响并不明显．

英文摘要：

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.