高温热管与高导热石墨烧蚀传热性能

Ablation and Heat Transfer Properties of High Temperature Heat-Pipe and High Thermal Conductivity Graphite

利用石英灯辐射加热器和电弧风洞耦合加热模拟高超声速飞行器驻点高温区的加热环境,对一种内部为高温热管和一种内部为高导热石墨的简单球柱形套装样件进行了加热试验。利用非接触红外测温装置对样件表面的温度进行了测量,通过与内部为C/C材料制成的对比样件的试验结果分析,发现高温热管和高导热石墨均能够有效地将样件驻点高温区热量传导到柱身低温区,其中高温热管样件驻点温度降低9.5%,柱身温度升高14.6%;高导热石墨驻点温度降低14.4%,柱身温度升高11.4%,显示两种材料均具有良好的热疏导效果。

With the quartz lamps and arc-heated wind tunnel, the high temperature supersonic flowfield was built. A principle thermal protection specimen with a high temperature heat-pipe and high thermal conductivity graph- ite was heated in this flowfield, the surface temperature distribution was measured by infrared temperature instru- ments. Compared with contrastive carbon/carbon composite material specimen, the stagnation point temperature of high temperature heat-pipe was decreased 9.5% as well as the cylinder surface temperature is increased 14.6% , the stagnation point temperature of high thermal conductivity graphite is decreased 14.4% as well as the cylinder surface temperature is increased 11.4%, both of the two specimens can transfer the heat load effectively from the high heatflux field to the lower one.