Analysis of counter flow of corona wind for heat transfer enhancement
Analysis of counter flow of corona wind for heat transfer enhancement
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DOI：
10.1007/s00231-017-2183-4
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发表时间：
2018-03
影响因子：
2.2
通讯作者：
D. Shin;S. Baek;H. Ko
中科院分区：
文献类型：
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作者：
D. Shin;S. Baek;H. Ko
本研究开发了一种用于电晕风逆流冷却装置的散热器。给出了利用电晕风进行强迫对流数值研究的详细信息。本文还对电晕风逆流散热器的散热片进行了研究。采用线板电极排列的电晕风力发电机，产生对流到翅片的气流。电晕风发电机结构紧凑、结构简单，便于逆流散热器的应用，证明了散热器对电子器件的冷却是有效的。进行了参数研究，分析了逆流对尾翼的影响。同时，为了验证数值计算结果，对电晕风源散热器的实验模型进行了速度和温度的测量。通过数值研究，给出了不同热流密度下的最佳翅片类型及其最佳高度、长度和螺距。此外，还推导了用换热系数计算散热器质量和散热性能的关联式。最后，与现有的带有转子风扇的商用中央处理器(CPU)冷却装置进行了比较，比较了这些装置的质量、功率、总尺寸和噪声对应的冷却效率。结果表明，电晕风逆流散热器对电子器件的散热效果较好，是现有大功率电子器件散热装置的合适替代方案。
A heat sink for cooling devices using the counter flow of a corona wind was developed in this study. Detailed information about the numerical investigations of forced convection using the corona wind was presented. The fins of the heat sink using the counter flow of a corona wind were also investigated. The corona wind generator with a wire-to-plate electrode arrangement was used for generating the counter flow to the fin. The compact and simple geometric characteristics of the corona wind generator facilitate the application of the heat sink using the counter flow, demonstrating the heat sink is effective for cooling electronic devices. Parametric studies were performed to analyze the effect of the counter flow on the fins. Also, the velocity and temperature were measured experimentally for the test mock-up of the heat sink with the corona wind generator to verify the numerical results. From a numerical study, the type of fin and its optimal height, length, and pitch were suggested for various heat fluxes. In addition, the correlations to calculate the mass of the developed heat sink and its cooling performance in terms of the heat transfer coefficient were derived. Finally, the cooling efficiencies corresponding to the mass, applied power, total size, and noise of the devices were compared with the existing commercial central processing unit (CPU) cooling devices with rotor fans. As a result, it was confirmed that the heat sink using the counter flow of the corona wind showed appropriate efficiencies for cooling electronic devices, and is a suitable replacement for the existing cooling device for high power electronics.