微喷管流动的DSMC方法模拟  

Simulation of Micro-Nozzle Flow by DSMC Method

作　　者：尹乐[1] 陈伟芳[1] 石于中[1] 

机构地区：[1]国防科技大学航天与材料工程学院,湖南长沙410073

出　　处：《国防科技大学学报》2004年第5期9-12,共4页Journal of National University of Defense Technology

基　　金：国家部委基金资助项目(5413030301KG01)

摘　　要：目前微型航天器正在积极地发展中,微喷管在其推进系统中具有重要地位,对微喷管进行进一步研究是很有必要的。运用DSMC(DirectSimulationMonte Carlo)方法从分子运动论层次对轴对称微喷管流动现象进行模拟,分析了喷管流量以及尺寸大小对喷管流动和性能的影响。研究表明,喷管流量及尺寸对流动特性和微喷管性能存在不同程度的影响。At present, micro-spacecrafts are being developed. Micro-nozzles are very important in propulsion systems of micro-spacecrafts. So further study on micro-nozzles is essential. DSMC(direct simulation Monte-Carlo)calculations for the flow in axisymmetric micro-nozzles are conducted on molecular-based models. The influence of the mass flow rate and dimension on the flow and performance in the nozzle are also discussed. The study indicates that the mass flow rate and dimension of the nozzle have different degrees of influence on the flow and performance.

关 键 词：微喷管 DSMC方法 航天器 推进系统 管流 流动特性 轴对称 Monte-Carlo 分子运动论 对流 

分 类 号：V430[航空宇航科学与技术—航空宇航推进理论与工程] V43