受激光控制分解式固体微推力器内流动特性研究  

Investigation on inner flow characteristics of the decomposable solid micro-thrusters controlled by laser

作　　者：胡春波[1] 张钢锤[2] 何国强[1] 姜立东[1] 彭永林[1] 

机构地区：[1]西北工业大学航天学院,西安710072 [2]中国航天科技集团公司四院四十一所,西安710025

出　　处：《固体火箭技术》2006年第2期91-94,98,共5页Journal of Solid Rocket Technology

基　　金：航天技术创新基金项目

摘　　要：建立了描述激光控制分解式固体微推力器内流动特性的计算模型,对激光微推力器内流动进行了数值计算,计算值与实验结果吻合较好。分析了气体粘性和压强对激光微推力器内流动特性的影响。结果表明,微推力器内流动受低压、小尺寸的综合影响,喷管喉径小于0.8 mm时,气体粘性对推力器性能影响显著增强;提高推力器内压强是减小粘性影响的一种有效手段。A computation model, which can be used for describing inner flow characteristics of the decomposable solid microthrusters controlled by laser, was derived to numerically calculate inner flow in the micro-thrusters. The calculated results coincided well with experimental results. The effects of gas viscosity and pressure on inner flow characteristics of micro-thrusters controlled by laser were analyzed. The results show that both low pressure and small dimension have effect on inner flow characteristics of microthrusters. When throat diameter of nozzle is less than 0.8 mm, the effects of gas viscosity on micro-thruster performances are obviously strengthened. It is an effective methods to reduce negative influence of gas viscosity by increasing the pressure in microthrusters.

关 键 词：微推力器 内流场 气体粘性 流动特性 

分 类 号：V439[航空宇航科学与技术—航空宇航推进理论与工程]