小尺度复层物体传热过程分析

马艳， 陈永昌*， 张辉， 马重芳

（北京工业大学 环境与能源工程学院；传热强化与过程节能教育部重点实验室暨传热与能源利用北京市重点实验室，北京 100124）

摘要： 以小尺度多层物体为对象，针对非对称传热工况，进行了复合传热特性及影响因素的分析。计算结果表明，电热膜发热量较低时，复合层各层的温差变化很小。随着发热量的增加，各层温差变化明显。电热膜的发热量约75%用于电热膜表面与空气的自然对流换热，25%用于向胶水侧的导热。改变复合层厚度对散热损失有一定影响，随着热通量的增加，厚度的改变对电热膜和玻璃的温差影响明显。

关键词： 小尺度； 非对称； 传热特性；复合层物体

 中图分类号： TK 124                           文献标志码： A

Performance Analysis on Heat Transfer Process of Small Scale Object

MA Yan， CHEN Yongchang， ZHANG Hui， MA Chongfang

(College of Environmental and Energy Engineering; Key Laboratory of Enhanced Heat Transfer and Energy Conservation,

Ministry of Education and Key Laboratory of Heat Transfer and Energy Conversion,

Beijing Education Commision,Beijing University of Technology,Beijing 100124,China)

Abstract： To analyze the characterization of multilayer heat transfer and the effects on it, small scale object was studied. The results revealed that the natural convection showed better performance than open cavity natural convection in heat transfer. The thickness changing of multilayer had some effects on heat loss under asymmetric condition. With heat flux increasing, the change of thickness had obvious effect on temperature variation of electrothermal film and glass.

Key words： small scale; asymmetric condition; characterization of heat transfer; multilayger object

 收稿日期： 20131127

基金项目： 国家自然科学基金项目（51276004）.

 作者简介： 马艳（1986—），女，硕士研究生.                       *通信联系人.