文档介绍：中国工程热物理学会传热传质学
学术会议论文编号:123694
新型蚀刻金属薄片式回热器交变流动特性研究
夏宇栋,陈曦基金项目:国家自然科学基金(50906054);教育部博士点新教师基金项目(20093120120006)资助
,张安阔
上海理工大学能源与动力工程学院上海 200093
Tel:********** Email:chenxistudy@
摘要:回热器是低温制冷机的关键部件,其交变流动特性对制冷机性能有重要影响。本文设计了一种新型蚀刻金属薄片式回热器,并建立了回热器的交变流动测试实验台。实验测试了新型蚀刻金属薄片式回热器和400目层叠丝网回热器在不同雷诺数下的基于最大流速的交变流阻系数fmax。通过实验数据分别拟合了两种结构回热器的交变流阻系数fmax与雷诺数之间的关系式。通过对两者关系式的比较发现:雷诺数较小时,两种回热器流阻系数差别不大,且交变流阻系数都随着雷诺数的增大时而减小至某一稳定值,但是在较大雷诺数的情况下,新型蚀刻金属薄片式回热器的交变流阻系数要明显小于层叠丝网回热器。
关键词:回热器;交变流动;蚀刻金属薄片
Oscillating Flow Characteristic Study on Novel Etched Foil Regenerator
Xiao Yudong, Chen Xi, Zhang Ankuo
School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
Abstract: A regenerator is a key part of regenerative cryocoolers, and its characteristic of oscillating flow gives predominant contribution to the performance of cryocoolers. A new pattern of etched foil regenerator was designed and a test bench of oscillating flow was set up. Oscillating flow resistance characteristic of novel etched foil regenerator was studied in the paper. Based on the cross-sectional max velocity, the oscillating flow friction factors of novel etched foil regenerator were obtained at different Reynolds numbers. The correlation equations for the friction factors in terms of Reynolds numbers were obtained. It is shown that tendency and variation of oscillating f