【摘要】 建立了一个窄缝宽度为 1～ 3 mm窄缝通道液氮传热实验装置 ,并对液氮窄缝传热进行了实验研究。在不同结构尺寸的三组窄缝结构中进行了大气压下饱和态及过冷态液氮传热实验。实验结果显示窄缝长度对饱和态液氮在窄缝中的传热的影响比较大 ,随着窄缝长度的增加 ,传热中的换热系数有较大增加。相对而言 ,实验范围中窄缝厚度对窄缝传热的影响很小 ,且窄缝中的换热系数随热流的增加会有所增大更多还原

【Abstract】 An experimental setup of liquid nitrogen heat transfer in narrow channels (width for 1～3 mm) is experiments are carried for saturated and subcooled liquid nitrogen corresponding to 3 widths of the narrow channel.The experiment shows that the length of the channel has strong influences on the heat transfer,the longer the channel length,and the higher the heat transfer coefficient.The width has weak influence on the narrow channel heat transfer;the heat transfer coefficient will increase with the heat flux.更多还原