中文摘要：

将烟幕应用于外层空间，研究烟幕云团的稳定性极为重要。针对外层空间高真空的特殊环境，基于燃烧型及粉末型烟幕云团，采用通过测试单位时间内云团边缘尺寸变化获取膨胀速率的方法，试验研究了真空度对烟幕云团形成时膨胀速率的影响。结果表明，烟幕云团的膨胀速率随着真空度由0．1MPa升高到0．04MPa而逐渐增大，并且压力每减小0．02MPa，膨胀速率约增大0．03倍左右。

英文摘要：

Based on the pyrotechnic and powder smoke cloud, the effect of vacuum pressure on the expanding velocity during the smoke cloud forming was studied experimentally with the method of the expansive velocity obtained by testing the increases of the cloud edge size. Results show that the expanding velocity increases with the increases of vacuum from 0. l0 MPa to 0.04 MPa, and the velocity increases about 0.03 times when the pressure decreases 0.02 MPa.