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Technical Briefs

Effect of Rotation on Heat/Mass Transfer for an Impingement/Effusion Cooling System

[+] Author and Article Information
Sung Kook Hong

 Korea Institute of Energy Research, Daejeon 305-343, Korea

Dong Hyun Lee

Department of Mechanical Engineering, Yonsei University, Seoul 120-749, Korea

Hyung Hee Cho1

Department of Mechanical Engineering, Yonsei University, Seoul 120-749, Koreahhcho@yonsei.ac.kr

1

Corresponding author.

J. Heat Transfer 132(11), 114501 (Aug 13, 2010) (3 pages) doi:10.1115/1.4002146 History: Received October 12, 2009; Revised July 07, 2010; Published August 13, 2010; Online August 13, 2010

In the present study, the effects of the rotating direction on heat/mass transfer in an impingement/effusion cooling system were investigated. The experiments were carried out with three different jet orientations relative to the axis of rotation and two plate spacing. For high H/d with an orthogonal jet orientation, low and nonuniform heat/mass transfer occurred between the effusion holes since the impinging jet was deflected by the Coriolis force. For a small H/d, the jet deflection effect was diminished, and rotation enhanced the heat/mass transfer in the stagnation region.

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Copyright © 2010 by American Society of Mechanical Engineers
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Figures

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Figure 1

Schematic view of (a) test duct and (b) jet orientation

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Figure 2

Contour plots of the Sh for (a) stationary case, (b) axial orientation, (c) leading orientation, and (d) trailing orientation with H/d=6.0

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Figure 3

Expected flow behavior of impingement/effusion cooling with axial orientation

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Figure 4

Local plots of the Sh for (a) z/d=−2.0 and (b) z/d=0.0 with H/d=6.0

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Figure 5

Contour plots of the Sh for (a) stationary case, (b) axial orientation, (c) leading orientation, and (d) trailing orientation with H/d=2.0

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Figure 6

Local plots of the Sh for various rotating cases of impingement/effusion cooling along z/d=−2.0 at H/d=2.0

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