Volume 27 Issue 12
Dec.  2012
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Article Navigation >  Journal of Aerospace Power  > 2012  >  27(12): 2681-2686
ZHOU Ming-zheng, XIA Guo-dong, CHAI Lei, ZHOU Li-jun, GAO Ning. Flow and heat transfer characteristics of drop-shaped micro pin-fin heat sinks with cross flow[J]. Journal of Aerospace Power, 2012, 27(12): 2681-2686.
Citation: ZHOU Ming-zheng, XIA Guo-dong, CHAI Lei, ZHOU Li-jun, GAO Ning. Flow and heat transfer characteristics of drop-shaped micro pin-fin heat sinks with cross flow[J]. Journal of Aerospace Power, 2012, 27(12): 2681-2686.
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Flow and heat transfer characteristics of drop-shaped micro pin-fin heat sinks with cross flow

  • 1.

    Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China

  • 2.

    Electric Power Research Institute of Xinjiang, Xinjiang Electric Power Company, Urumqi 830011, China

  • Received Date: 2011-12-01
  • Publish Date: 2012-12-28
    Abstract
  • Three drop-shaped micro pin-fin heat sinks with different tail angles were designed based on the optimization of traditional round micro pin-fin heat sink.The flow resistance and heat transfer characteristics of the heat sinks were experimentally investigated using deionized water as working fluid.The results show that the micro pin-fin with tail angle of 60° has the lowest flow resistance among the heat sinks.The streamlined structure of drop-shaped micro pin-fins improves the distribution of flow and delays the conversion from laminar to turbulent flow.The smaller the angle, the more obvious the effect.The optimal angle of drop-shaped micro pin-fin is different under different flow rates.The heat sink with tail angle of 60° has the strongest heat transfer coefficient at the corresponding Reynolds number in this experiment (Reynolds number is equal to 200-1000).When the tail angle decreases to 30°, the heat transfer is also enhanced in the tail section of micro pin-fin.However, the flow is affected by the micro pin-fin behind, so the heat resistance is higher than other heat sinks under the same pump power.

     

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