Heat transfer enhancement in a grooved channel with curved vanes

被引：79
|
作者：
Herman, C [1 ]
Kang, E [1 ]
机构：
[1] Johns Hopkins Univ, Dept Mech Engn, 3400 Charles St, Baltimore, MD 21218 USA
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2002年 / 45卷 / 18期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1016/S0017-9310(02)00092-3
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
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.
引用
收藏
页码：3741 / 3757
页数：17
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