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首页> 外文期刊>International Journal of Heat and Mass Transfer >Study of thermal and flow characteristics of a heated cylinder under dual piezoelectric fans actuation
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Study of thermal and flow characteristics of a heated cylinder under dual piezoelectric fans actuation

机译:双压电风扇驱动下加热缸的热和流动特性研究

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摘要

Piezoelectric fan has been considering as an enhanced heat transfer device since the size of modern electric products continues to decrease and the heat dissipation per unit volume is growing rapidly. The present study analyzed the flow mechanism and heat transfer performance of dual fans installed on the both opposite sides of a heated cylinder. Three different vibration phases; the in-phase, counter-phase and perpendicular-phase were proposed to evaluate the suitable dual piezoelectric fans arrangement for getting the effective heat transfer enhancement. The numerical results showed the detailed streamlines and velocity vectors around the piezoelectric fans and heated cylinder. In addition, the average surface temperatures with the position of piezoelectric fan for three phases were sketched to indicate the heat transfer performance. A maximum heat transfer augmentation ratio of 3.20 is achieved for the dual fans vibrated in-phase at the installed position of y/H = 0.625.
机译:压电风扇一直被认为是一种增强的传热装置,因为现代电气产品的尺寸不断减小,并且每单位体积的散热迅速增长。本研究分析了安装在加热缸两侧的双风扇的流动机理和传热性能。三种不同的振动阶段;提出了同相,反相和垂直相,以评估合适的双压电风扇布置,以有效地提高热传递。数值结果显示了压电风扇和加热缸周围的详细流线和速度矢量。此外,还绘制了三相压电风扇位置的平均表面温度,以表明其传热性能。在y / H = 0.625的安装位置处同相振动的双风扇的最大传热增强率达到3.20。

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