The purpose of this study is to explore the heat dissipation efficiency of piezoelectric fan with different type heat sinks by changing the piezoelectric fan height which is relative to three different heat sinks. This study use flow visualization technique with driven by 110V, 60Hz and fix the amplitude range of piezoelectric fan and distance (0.5 mm,1mm,2mm,3mm,4mm,5mm and 7mm) between blade tip and fin side. To examine the piezoelectric fan flow phenomena with single fin, end-slotting plate-fin heat sink, middle-end slotting plate-fin heat sink. From the fin temperature gradient of infrared image, the empirical results showed the change of slope on the isothermal under the free convection and jet-like flow forced convection. The distance between blade tip and heat sink is getting closer, and the thermal resistance is less. Oppositely, with the distance increased, the thermal resistance is getting upward. Compare to the thermal resistance of non-piezoelectric fan and piezoelectric fan with single fin, it had been found the piezoelectric fan which used in this research can increases the thermal resistance up to four times, and it can be three to five times when using multi-fin. Besides, as piezoelectric fan works with multi-fin and set at the middle, the amplitude covers the most part of heat sink. That could push the air into the heat sink effectively for cooling. Moreover, comparing to the thermal resistances, it found the middle-end slotting plate-fin heat sink acquire the lower thermal resistance. Heat transfer resistance of the sink fin is designed with operating twin piezoelectric fans. The thermal image obtained by infrared thermography to investigate the t

中文翻译：

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通过操作压电风扇增强板翅式散热器的传热研究

本研究的目的是通过改变相对于三个不同散热器的压电风扇高度，来探索具有不同类型散热器的压电风扇的散热效率。本研究使用以110V，60Hz驱动的流动可视化技术，并确定压电风扇的振幅范围以及叶片尖端与散热片侧面之间的距离（0.5 mm，1mm，2mm，3mm，4mm，5mm和7mm）。要检查单翅片，端开槽平板翅片散热器，中端开槽平板翅片散热器的压电风扇流动现象。从红外图像的翅片温度梯度可以看出，在自由对流和喷射流强迫对流作用下，等温斜率的变化。刀片尖端与散热器之间的距离越来越近，热阻也越来越小。相反，随着距离的增加，热阻逐渐增大。与非压电风扇和单翅片压电风扇的热阻相比，发现本研究中使用的压电风扇可以将热阻提高四倍，而使用多片压电风扇的热阻可以提高三到五倍。 -鳍。此外，由于压电风扇与多翅片一起工作并位于中间，因此振幅覆盖了散热器的大部分。这样可以将空气有效地推入散热器进行冷却。此外，与热阻相比，发现中端开槽平板翅片散热器的热阻较低。散热片的传热阻力设计为使用双压电风扇运行。通过红外热像仪获得的热图像来研究温度