Heat transfer enhancement in a grooved channel with curved vanes
Heat transfer enhancement in a grooved channel with curved vanes
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DOI：
10.1016/s0017-9310(02)00092-3
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发表时间：
2002-08-01
影响因子：
5.2
通讯作者：
Kang, E
中科院分区：
文献类型：
--
作者：
Herman, C;Kang, E
本文利用全息干涉法显示了带有弯曲叶片的槽道内的非定常温度场。研究通道的差拍传递性能进行了比较，与基本的槽道。在加热块的下游端上方添加弯曲叶片将流从主通道重新引导到凹槽中。当与基本槽道相比时，热传递显示出1.5-3.5倍的增加，这主要是由于槽区域中的流速增加。在Re = 450附近，流动从稳定过渡到振荡，并且流动振荡有助于传热增强。压降比基本槽道中的压降高3-5倍。(C)2002爱思唯尔科技有限公司。保留所有权利。
We visualize unsteady temperature fields in the grooved channel with curved vanes using holographic interferometry. The beat transfer performance of the investigated channel is compared with that of the basic grooved channel. The addition of curved vanes above the downstream end of the heated block redirects the flow from the main channel into the groove. Heat transfer shows an increase by a factor of 1.5-3.5, when compared to the basic grooved channel, mainly due to increased flow velocities in the groove region. Flow transition from steady to oscillatory occurs around Re = 450 and flow oscillations contribute to heat transfer enhancement. The pressure drop is 3-5 times higher than in the basic grooved channel. (C) 2002 Elsevier Science Ltd. All rights reserved.