摘要
高温气体流场辐射特性在高超声速飞行器目标探测、识别和气动热环境预测等方面具有重要应用。基于带辐射模型,考虑硅基防热材料热化学烧蚀产物的可见光和红外辐射机制,建立了烧蚀产物光谱参数的计算方法,发展了高温气体烧蚀流场辐射特性计算软件。高温气体烧蚀流场的数值模拟结果,利用所发展的辐射计算软件,计算分析了自由飞弹道靶实验模型及高超声速钝头体流场的辐射特性,重点研究了各种烧蚀产物的影响。研究表明:烧蚀产物对流场红外辐射特性具有重要影响。
The radiation characteristics of high-temperature gas flow have important application in detection, discrimination and aerothermal environment prediction for hypersonic vehicles. Based on a band model and considering the visible and infrared radiation of the ablation products of silicon-based materials for heat-shield, the method and code were developed to compute spectral parameter of ablation products and the radiation characteristics of high temperature gas flow field. The flow field parameters resulted from the numerical simulation and used the code, the radiation characteristics of flow over a model in a free-flight ballistic range and hypersonic blunt body were computed, and particularly the ablation effects were studied. The research shows that the ablation products have important effects on infrared radiation of the flow field.
出处
《红外与激光工程》
EI
CSCD
北大核心
2015年第1期42-47,共6页
Infrared and Laser Engineering
基金
国家自然科学基金(91216204)
关键词
高超声速飞行器
硅基材料
流场
高温气体
烧蚀产物
辐射特性
hypersonic vehicles
silicon-based materials
flow field
high-temperature gas
ablation products
radiation characteristics
