摘要
光子晶体在红外波段同时具有高反射率和高辐射率,可作为高超声速飞行器的防热材料。文章利用FLUENT软件和辐射模型中的离散坐标算法对有/无光子晶体防热层结构进行了气动加热数值模拟计算,得到了在不同热流密度条件下基体的温度分布;通过计算结果的对比发现,采用光子晶体防热层结构使基体温度下降约360～515 K,具有良好的热控性能。光子晶体是一种具有广阔应用前景的热防护材料,作为高超声速飞行器的防热层结构的可行性与有效性还有待深入研究。
Photonic crystals（PCs） with high reflectivity and high emissivity in infrared wave band are used for thermal protection of hypersonic aircrafts. FLUENT and Discrete Ordinate（DO） algorithm of radiative model were used to simulate aerodynamic heating of the structures with PCs and without PCs in this paper. Temperature distribution of the two structures under different thermal flux was obtained. Comparison of the simulation results between the two structures shows that the temperature of the structure with PCs decreases about 360~515 K, and the structure with PCs has good performance of thermal control. PCs are thermal protection materials with extensive application potential. Feasibility of PCs applied in the thermal protection structures of hypersonic aircrafts will be investigated further.
出处
《航天器环境工程》
2014年第3期301-305,共5页
Spacecraft Environment Engineering
基金
国家自然科学基金项目(编号:51006026
91216123)
中央高校基本科研业务费专项资金项目(编号:HIT.NSRIF.2012072)
关键词
光子晶体
热防护
气动加热
导热-辐射耦合传热
photonic crystals
thermal protection
aerodynamic heating
coupled conductive-radiative heat transfer
