摘要
对多孔介质材料在低温下的传热特性进行了实验研究,在填充液氮以后其低温维持时间明显增加,主要原因是由于多孔材料的参与改变了传热特性;采用连续介质管束模型,用有限元分析软件对其整体温度场分布进行了数值模拟计算,计算结果和实验数据吻合。
An experimental study on heat transfer characteristic of porous media material under the low temperature was introduced. It indicates that the low temperature maintaining time increases obviously after filling in the liquid nitrogen due to the participating of porous material which changes the heat transfer characteristic. The bundle of tubes model and a method of numerical simulation calculation with the whole temperature field distribution by using the finite element analysis software were recommended. The result accords with the experimental data.
出处
《真空与低温》
2007年第2期98-101,共4页
Vacuum and Cryogenics
基金
真空低温技术与物理国家级重点实验室基金(9140C550801)资助
关键词
多孔介质
低温传热
管束
有限元
porous media
heat transfer under the low temperature
bundle of tubes
finite element
