电弧加热流场中的尖锥边界层转捩研究  

Sharp Cone Boundary Layer Transition in Arc Heated Flow Field

作　　者：张骞[1] 艾邦成[1] 

机构地区：[1]中国航天空气动力技术研究院,北京100074

出　　处：《宇航材料工艺》2008年第5期25-28,共4页Aerospace Materials & Technology

摘　　要：电弧加热流场的热环境特性直接影响热防护系统的地面试验数据,为研究电弧加热流场热环境特性对于边界层转捩的影响,采用红外线热图技术,在电弧加热流场中进行了边界层转捩对尖锥模型气动热的影响研究。试验模型分为8°钢制尖锥、5°非金属和金属尖锥,结合数值计算,对试验结果进行了分析。结果表明,采用红外热像仪判读表面温度的方法进行转捩的判断是一种可行的方法,马赫数影响的雷诺数转捩判别准则可以用于电弧加热流场计算的转捩雷诺数。Ground test data of heat shield system was directly influenced by heat environment charactistics in arc heated flow field. The influence of bundary layer transition on sharp cone model aeroheating was studied by using infrared thermo-graphical technology in order to investigate the influence of environment characteristics in the arc heated flow field on bundary layer transition. Test models were 8 ° sharp cone steel model,5° sharp cone steel and nonmetal model. Test results are analysed with numerical calculation method, shown as follows. It is concluded that transition estimate by infrared thermo-graphical apparatus is feasible, transition Reynolds number criteria influenced by Mach number can be used in calculation of arc heated flow field.

关 键 词：尖锥 边界层转捩 电弧加热 雷诺数 

分 类 号：V211.41[航空宇航科学与技术—航空宇航推进理论与工程] TF748.41[冶金工程—钢铁冶金]