电子发汗冷却技术及其研究进展  

ELECTRON TRANSPIRATION COOLING TECHNOLOGY AND ITS RESEARCH PROGRESS

作　　者：苑朝凯 王春[1] 姜宗林[1] Yuan Chaokai;Wang Chun;Jiang Zonglin(Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]中国科学院力学研究所,北京100190

出　　处：《力学学报》2024年第3期507-520,共14页Chinese Journal of Theoretical and Applied Mechanics

基　　金：国家自然科学基金资助项目(12272385)。

摘　　要：电子发汗冷却是一种新型的高超声速主动热防护技术,利用材料的热电子发射效应,通过热电子将热载荷转移至流场下游,降低了尖前缘结构热流密度峰值和梯度,为高超飞行器尖前缘结构热防护系统设计提供了新的思路.作为一种潜在的冷却技术,文章主要介绍了电子发汗冷却的工作原理、技术特点,综述了国内外相关研究进展,并对未来发展需解决的关键问题进行了讨论.Electron transpiration cooling is a new type of hypersonic active thermal protection technology that utilizes the thermionic emission effect of materials.The thermal load is transferred to the downstream of the flow field by the emitted electrons,reducing the peak value and gradient of the heat flux.The electron transpiration cooling will open door to hypersonic thermal protection system designs previously unattainable.As a potential cooling technology,the working principle and technical characteristics were introduced in detail in this paper.Also,research progresses on electron transpiration cooling were reviewed and key issues needed to be addressed for further development were discussed.

关 键 词：热电子效应 发汗冷却 主动冷却 热防护 高超声速 

分 类 号：O354.7[理学—流体力学]