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Heat Transfer Characteristics on Effusion Plate in Impingement/Effusion Cooling for Combustor
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 Title & Authors
Heat Transfer Characteristics on Effusion Plate in Impingement/Effusion Cooling for Combustor
Rhee, Dong-Ho; Cho, Hyung-Hee;
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 Abstract
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 for the two different ways: 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). More uniform and higher heat/mass transfer characteristic is obtained in overall region with small gap between two perforated plates.
 Keywords
Impingement/Effusion Cooling;Heat and Mass Transfer Analogy;Naphthalene Sublimation Method;Hole Arrangement;Gap Distance;
 Language
Korean
 Cited by
1.
유출홀이 설치된 배열 충돌제트의 유동 및 열전달 특성,이동호;윤필현;조형희;

대한기계학회논문집B, 2001. vol.25. 11, pp.1606-1615 crossref(new window)
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