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Journal of Enhanced Heat Transfer
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ISSN Imprimir: 1065-5131
ISSN En Línea: 1026-5511

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Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v12.i1.70
pages 101-120

Effect of Mesh Screen on Heat Transfer Enhancement of Impinging Jet

D. W. Zhou
Institute of Engineering Thermophysics, Chinese Academy of Sciences B12, Zhongguancun, Haidian District, Beijing 100080, P.R. China
Sang-Joon Lee
Department of Mechanical Engineering, Pohang University of Science and Technology, San 31, Hyoja-dong, Pohang, 790-784, Korea; Dept. of Mechanical Engineering, Korea Advanced Institute of Science and Technology, p.o. Box 150, Chongyangni , Seoul, Korea

SINOPSIS

An experiment has been carried out to investigate heat transfer enhancement by installing a mesh screen inside of a jet nozzle. The effects of mesh screen location, nozzle-to-plate spacing, and jet Reynolds number on heat transfer augmentation were studied. Results show that mesh screen location and nozzle-to-plate spacing have significant influence on the flow structure and heat transfer of impinging jet. Among three mesh screen locations, the jet with L/d = 0 gives the maximum heat transfer rate. Compared with the case of no screen, the local and average Nusselt numbers in the stagnation region are increased up to 27.13% and 7.42%, respectively.


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