Single-phase forced convective heat transfer in swirl microchannels
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摘要: 以体积浓度30%的乙二醇水溶液为工质,采用定热流加热方式,对槽宽0.3mm的4个深度不同的矩形截面涡旋微槽试件的换热性能进行了实验研究.试件所用材料为紫铜,每个试件上分布6个涡旋微槽.实验测量了不同工质流量,不同加热功率下涡旋微槽的换热性能,分析了微槽结构、工质流速对其换热性能的影响,拟合得到相应的换热实验关联式.与平直微槽的换热性能进行了对比,结果表明涡旋微槽散热器的换热性能优于平直微槽散热器.Abstract: The experiment of heat transfer in four swirl microchannel test pieces was conducted with ethylene glycol solution of 30% (volume concentration). The test pieces- cross section was rectangular with width 0.3mm and different depth. Constant heat flux was adopted as heating manner. Each test piece was made of copper and contained six microchannels. The heat transfer characteristic of swirl microchannel under the different liquid flux and the heating power was investigated. The influence of microchannel structure and liquid velocity was analyzed. Heat transfer experimental formula was obatined. Heat transfer characteristic was compared with straight microchannel. The result shows that heat transfer performance of swirl microchannel is better than straight microchannel.
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Key words:
- swirl /
- microchannel /
- heat transfer
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