空间CO_2羽流压力场的数值计算和实验研究  

Numerical and Experimental Investigations of Carbon Dioxide Nozzle Plume Flow in Space Environment

作　　者：肖泽娟[1] 程惠尔[1] 周红玲[2] 周伟敏[3] 

机构地区：[1]上海交通大学航空航天系,上海200240 [2]上海航天动力机械研究所,上海200233 [3]上海卫星工程研究所,上海200240

出　　处：《宇航学报》2008年第1期265-269,共5页Journal of Astronautics

摘　　要：要解决空间羽流污染问题,首先必须精确掌握羽流场的特征。为此,在真空深冷背景环境下进行了CO2气体模拟发动机羽流压力场的数值计算和实验研究。采用经典的计算流体动力学(CFD)和直接模拟MonteCarlo(DSMC)相结合的方法进行羽流场的数值模拟。试验模拟空间高度在100公里以上,在整个测试过程真空舱内压力维持在10-3Pa量级,冷阱温度为93±5K。计算结果与测试数据吻合较好,表明文中计算方法和物理模型可以准确描述真空深冷空间环境下的羽流场特征。In order to solve the plume contamination problem,first of all,the character of the plume flow field must be known accurately.Experimental and numerical investigations are performed for the carbon dioxide plume flows expansion from a simulated small thruster into high-vacuum and cryogenic conditions.The computational fluid dynamics(CFD) method and the direct simulation Monte Carlo(DSMC) method are combined to solve this problem.The experimental measurements were conducted under the simulated altitude which ...

关 键 词：羽流试验 DSMC CFD 稀薄气体 皮托压力 

分 类 号：V211.14[航空宇航科学与技术—航空宇航推进理论与工程]