Forced convective heat transfer with impinging rectangular jets

被引：83
|
作者：
Zhou, D. W. [1 ]
Lee, Sang-Joon
机构：
[1] Arizona State Univ, Dept Mech & Aerosp Engn, Tempe, AZ 85287 USA
[2] Pohang Univ Sci & Technol, Dept Mech Engn, Pohang 790784, South Korea
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2007年 / 50卷 / 9-10期
关键词：
rectangular jet impingement; heat transfer; turbulence intensity; convection;
D O I：
10.1016/j.ijheatmasstransfer.2006.09.022
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The fluid flow and heat transfer characteristics of a rectangular air jet impinging on a heated flat plate have been investigated experimentally. The effects of jet Reynolds number and nozzle-to-plate spacing on local and average Nusselt number were studied. Results show that both have a significant influence on heat transfer behaviors of impinging jets. Local and average heat transfer data along the axial and lateral directions were correlated and compared with the previous data. The local Nu number and the free-stream turbulence intensity of impinging jets exhibit a relationship: Nu/Re-1/2 = 0.014 Tu Re-1/2 + 0.517. The corresponding average Nu number and turbulence intensity have a relationship: Nu/Re-1/2 = 0.014 Tu-Re-1/2 +0.472. Heat transfer mechanics was analyzed in terms of the turbulence intensity. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1916 / 1926
页数：11
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