| 新型结构硅基微通道中层流换热的实验研究 |
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| 作者姓名： | 甘云华 徐进良 |
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| 作者单位： | 1. 中国科学院广州能源研究所微能源系统实验室, 广州 510640;
2. 中国科学技术大学热科学与能源工程系, 合肥 230026 |
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| 基金项目： | 国家自然科学基金项目(10272102)资助 |
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| 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1553μm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.
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| 关 键 词： | 微电子机械系统 热边界层中断技术 强化换热 |
| 收稿时间： | 2004-06-06 |
| 修稿时间： | 2004-07-14 |
Experimental Investigation of Laminar Heat Transfer in Silicon Microchannels with New Structure |
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| Authors: | GAN Yun-Hua XU Jin-Liang |
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| Institution: | 1. Microscale Energy System Laboratory, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China;
2. Department of Thermal Science and Energy Engineering, University of Scie nce and Technology of China, Hefei 230026, China |
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| Abstract: | In order to both enhance heat transfer and reduce flow resistance, microchannels having new interlaced structure with hydraulic diameter of 15513 Lm were designed based on the breaking-up thermal boundary layer technology. Using deionized water as working fluid, keeping the three control parameters ) inlet temperature, heating power, andmass flux ) very close, comparative experiments were carried out between the test section having the new interlaced structure microchannels and the test section having conventional structure microchannels. And experimental results show that applying the new structure can diminish pressure drop across test section, reduce friction constant, enhance heat transfer and drop the wall temperature. |
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| Keywords: | MEMS breaking-up thermal boundary layer technology heat transfer enhancement |
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