Volume 28 Issue 12
Dec.  2013
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CHAI Lei, XIA Guo-dong, ZHOU Ming-zheng, CUI Zhen-zhen. Heat transfer enhancement characteristics of parallel-microchannel silicon heat sink with expansion-constriction cross sections[J]. Journal of Aerospace Power, 2013, 28(12): 2725-2730.
Citation: CHAI Lei, XIA Guo-dong, ZHOU Ming-zheng, CUI Zhen-zhen. Heat transfer enhancement characteristics of parallel-microchannel silicon heat sink with expansion-constriction cross sections[J]. Journal of Aerospace Power, 2013, 28(12): 2725-2730.
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Heat transfer enhancement characteristics of parallel-microchannel silicon heat sink with expansion-constriction cross sections

  • 1.

    College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China

  • 2.

    Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China

  • Received Date: 2012-11-05
  • Publish Date: 2013-12-28
    Abstract
  • With deionized water as working fluid,experiments on fluid flow and heat transfer enhancement characteristics were conducted in the parallel-microchannel silicon heat sink with expansion-constriction cross sections.Based on the microscale heat transfer enhancement mechanism,two parallel-microchannel silicon heat sink with expansion-constriction cross sections were designed and processed.In contrast to the corresponding conventional rectangular microchannel heat sink,the flow and heat transfer parameters of parallel-microchannel silicon heat sink with expansion-constriction cross sections were obtained in different volume flow rates and constant wall heat flux,along with simultaneous measurement of volume flow rate,pressure drop and temperature in the inlet and outlet,and wall temperature at the substrate of heat sink.It is found that the heat transfer rate of parallel-microchannel silicon heat sink with expansion-constriction cross sections is increased by 12.5%-85.1% over the rectangular straight microchannel heat sink value,but the friction factor is only increased by -9.2%-31.4%,showing that the parallel-microchannel silicon heat sink with expansion-constriction cross sections has superior heat transfer enhancement characteristics.

     

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