摘要
基于热边界层中断技术 ,设计了一种新型的带有交错结构的、当量直径为 1 5 5 3μm的微通道 ,以实现强化换热同时减小流动阻力的目的 .以去离子水作为工质 ,在入口温度、加热功率及质量通量 3个控制参数十分相近的工况条件下 ,在这种含有新型结构微通道的实验段 ,及含有常规结构微通道的实验段内 ,进行层流流动与换热的对比实验研究 .结果表明 ,采用新型结构能减小微通道进出口压差 ,降低摩擦常数 ,并且能较好地强化换热 ,降低微通道壁面温度 .
In order to both enhance heat transfer and reduce flow resistance, mic rochannels having new interlaced structure with hydraulic diameter of 155 3 μm w ere designed based on the breaking-up thermal boundary layer technology. Using d eionized water as working fluid, keeping the three control parameters—inlet t emperature, heating power, and mass flux—very close, comparative experiments were carried out between the test section having the new interlaced structure mi crochannels and the test section having conventional structure microchannels. An d experimental results show that applying the new structure can diminish pressur e drop across test section, reduce friction constant, enhance heat transfer and drop the wall temperature.
出处
《中国科学院研究生院学报》
CAS
CSCD
2005年第2期157-163,共7页
Journal of the Graduate School of the Chinese Academy of Sciences
基金
国家自然科学基金项目 (10 2 72 10 2 )资助
关键词
微电子机械系统
热边界层中断技术
强化换热
MEMS, breaking-up thermal boundary layer technology, heat transfer enhancement
