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| 空间低红外辐射液氮冷屏低温特性研究 | |
| 引用本文： | 张周卫,厉彦忠,汪雅红,陈光奇,葛瑞宏,潘雁频.空间低红外辐射液氮冷屏低温特性研究[J].机械工程学报,2010,46(2). |
| 作者姓名： | 张周卫 厉彦忠 汪雅红 陈光奇 葛瑞宏 潘雁频 |
| 作者单位： | 1. 西安交通大学能源与动力工程学院,西安,710049 2. 兰州电源车辆研究所技术开发部,兰州,730050 3. 兰州物理研究所真空低温技术与物理国家级重点实验室,兰州,730000 |
| 基金项目： | 中国航天科技集团公司预研资助项目(617010303) |
| 摘 要： | 应用低温冷屏蔽方法可以降低空间飞行器表面红外辐射强度。建立分层贮液及气流分离空间冷屏蔽系统模型,应用流场数值模拟参数计算对流换热经验关联式并获得不同边界对流换热系数,将对流边界条件代入稳态传热数值模拟过程并得到液相区及气相区表面温度分布规律。建立单元传热试验模型,应用当量分析法对试验模型天地一致性进行分析,结果表明:极端状态下分层贮液高度小于100mm时传热模拟表面最大温度92.9K,流场最大温度107K,试验最大温度180K,受当量辐射影响,试验温度梯度与模拟梯度外形相似但大于模拟温度梯度;试验当量辐射接近1592.6W/m2,地面液氮维持时间15min,空间维持时间大于30min;分层贮液模型能够使空间飞行器在特定时间段内表面温度低于100K,红外辐射强度低于0.5W/m2。 |
| 关 键 词： | 冷屏 红外辐射 当量辐射 液氮 |
Research on Cryogenic Character of Spatial Low Infrared Radiated Cold-shield with Liquid Nitrogen |
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| ZHANG Zhouwei,LI Yanzhong,WANG Yahong,CHEN Guangqi,GE Ruihong,PAN Yanpin.Research on Cryogenic Character of Spatial Low Infrared Radiated Cold-shield with Liquid Nitrogen[J].Chinese Journal of Mechanical Engineering,2010,46(2). | |
| Authors: | ZHANG Zhouwei LI Yanzhong WANG Yahong CHEN Guangqi GE Ruihong PAN Yanpin |
| Affiliation: | 1. School of Energy and Power Engineering/a>;Xi'an Jiaotong University/a>;Xi'an 710049/a>;2. Technique Department/a>;Lanzhou Power Station & Vehicle Institute/a>;Lanzhou 730050/a>;3. Lanzhou Institute of Physics/a>;National Key Laboratory of Vacuum & Cryogenics Technology and Physics/a>;Lanzhou 730000 |
| Abstract: | Using the cryogenic cold shield method can decrease the exterior infrared intensity of spacecraft. A model of layered reservoir and gas-liquid separated spatial cold-shield is established. Numerical simulation parameters of flow field are used to calculate the empirical heat convectional relations and obtain convectional coefficients on different boundary conditions,and by substituting different boundary conditions to steady-state heat-transfer simulation process,the regularity of temperature distribution i... |
| Keywords: | Cold shield Infrared radiation Equivalent radiation Liquid nitrogen |
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