固体火箭技术2016，Vol.39Issue(1)：50-55,89,7.DOI:10.7673/j.issn.1006-2793.2016.01.009
散热损失对微推进器性能的影响
Influences of heat loss on micro thruster
摘要
Abstract
The performance of micro thruster is influenced greatly by heat loss due to the small size of micro thruster. The heat loss of the combustion chamber wall in micro thruster array and the performance of unit engine affected by the heat loss were stud-ied. Thrust produced by micro thruster was measured and compared with the theoretical value. The results indicate that temperature, thermal stress and thermal deformation are at their maximum on the surface of combustion chamber wall in micro thruster array. The thermal stress and thermal deformation of silicon wall are smaller than the steel ones. The heat loss at nozzle throat is the most seri-ous. The heat loss makes temperature of nozzle outlet and exit velocity decrease, and the thrust is reduced by 11%. For different en-gine unit, the measured thrust is diverse, but it is smaller than the adiabatic thrust. What's more, mean of the measured thrust is smaller than the value obtained from the heat loss calculation.关键词
微推进器/散热损失/微推力/温度分布/热应力Key words
micro thruster/heat loss/micro thrust/temperature distribution/thermal stress分类
航空航天引用本文复制引用
胡松启,刘欢,武冠杰,陈静,高胜灵..散热损失对微推进器性能的影响[J].固体火箭技术,2016,39(1):50-55,89,7.基金项目
西北工业大学基础研究基金( JC201221)。 （ JC201221）
