摘要
通过在铝合金棒表面制备阳极氧化热阻层和Teflon热阻层,分别对电抛光、阳极氧化和涂覆Teflon层等表面在液氮浴中的低温淬火过程进行实验研究,通过对传热反问题求解分析,研究了热阻层对低温淬火过程的影响。结果表明,热阻层能显著提升莱登佛罗斯特点的温度和临界热流密度,使整体的换热能力提高,从而加速了低温冷却过程。
Quenching is frequently encountered in the fields of cryogenic applications. In the present study, the influences of the thermal resistance layer resulted from the anodized surface and Teflon surface on quenching heat transfer in liquid nitrogen were investigated by solving inverse heat conduction equation. The results show that the thermal resistance layer on the surface of aluminum alloy cylinder can enhance the Leidenfrost point temperature and critical heat flux significantly, which lead to a better overall heat transfer performance than that of electropolished surface.
作者
徐维泰
程诚
张鹏
Xu Weitai;Cheng Cheng;Zhang Peng(Institute of Refrigeration and Cryogenics,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Engineering Research Center of Space Engine,Shanghai Institute of Space Propulsion,Shanghai 201112,China;State Key Laboratory of Technologies in Space Cryogenic Propellants,Beijing 100028,China)
出处
《低温与超导》
CAS
北大核心
2019年第12期1-5,31,共6页
Cryogenics and Superconductivity
基金
国家自然科学基金项目(51676122)
上海市科学技术委员会项目(17DZ2280800)
航天低温推进剂技术国家重点实验室基金项目(SKLTSCP1907)
关键词
淬火换热
反问题
热阻层
莱登佛罗斯特点
临界热流密度
Quenching heat transfer
Inverse problem
Thermal resistance layer
Leidenfrost point
Critical heat flux
