外大气层空间红外烟幕运动特性和遮蔽特性

 分析了外大气层空间烟幕微粒的运动特性、烟幕发生器的施放方式及红外烟幕的遮蔽效果，论证了红外烟幕应用于外大气层空间的可行性。以粒径1～10 μm的超微粉天然鳞片石墨为例，计算分析了红外烟幕在外大气层空间应用中的运动特性、有效遮蔽时间和范围。在烟幕施放过程中，施放时赋予烟幕微粒相对于飞行器的初速度直接影响了烟幕的扩散速度，从而影响了烟幕的滞留时间。通过控制烟幕发生器的施放速度，使用较小体积和质量的烟幕剂，可在约10 min内实现对外大气层空间目标的遮蔽需求。

Motional characteristics and obscuration effect of infrared smoke screen in exoatmospheric space

The motional characteristics, spreading way and obscuration effect of infrared smoke screen particle are analyzed in this paper. Feasibility of infrared smoke screen used in exoatmospheric space is evaluated. Ultra-micro powder crystalline flake graphite with diameter of 1～10 μm is chosen as smoke screen material in consideration of its infrared attenuation effect. Initial velocity of smoke screen particle affects diffusivity of smoke screen. Obscuration for exoatmospheric target during about 10 minutes could be achieved with less smoke screen material by control the spreading velocity of smoke screen generator.