The present study is conducted to investigate the local heat/mass transfer characteristics for flow through perforated plates. A naphthalene sublimation method is employed to determine the local heat/mass transfer coefficients on the effusion plate. Two parallel perforated plates are arranged in two different configurations: staggered and shifted in one direction. The experiments are conducted for hole pitch-to-diameter ratios of 6.0, for gap distance between the perforated plates of 0.33 to 10 hole diameters, and for Reynolds numbers of 5,000 to 12,000. The result shows that the high transfer region is formed at stagnation region and at the mid-line of the adjacent impinging jets due to secondary vortices and flow acceleration to the effusion hole. For flows through the perforated plates, the mass transfer rates on the surface of the effusion plate are about six to ten times higher than for effusion cooling alone (single perforated plate). In general, higher heat/mass transfer is obtained with smaller gap distance between two perforated plates.
|Title of host publication||Heat Transfer; Electric Power; Industrial and Cogeneration|
|Publisher||American Society of Mechanical Engineers (ASME)|
|ISBN (Electronic)||9780791878569, 9780791878569|
|Publication status||Published - 2000|
|Event||ASME Turbo Expo 2000: Power for Land, Sea, and Air, GT 2000 - Munich, Germany|
Duration: 2000 May 8 → 2000 May 11
|Name||Proceedings of the ASME Turbo Expo|
|Other||ASME Turbo Expo 2000: Power for Land, Sea, and Air, GT 2000|
|Period||00/5/8 → 00/5/11|
Bibliographical noteFunding Information:
The authors wish to acknowledge support for this study by the KOSEF through the Turbo and Power Machinery Research Center (TPMRC) and by the Korea Science and Engineering Foundation under the grant No. 98-0200-13-01-3.
Copyright © 2000 by ASME.
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