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Journal of Enhanced Heat Transfer
Импакт фактор: 1.406 5-летний Импакт фактор: 1.075 SJR: 0.287 SNIP: 0.653 CiteScore™: 1.2

ISSN Печать: 1065-5131
ISSN Онлайн: 1563-5074

Выпуски:
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Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v17.i3.20
pages 223-229

Heat Transfer and Flow Characteristics of Fluid Jets Impinging on a Surface with Cavities

Tilak T. Chandratilleke
Department of Mechanical Engineering, Curtin University, GPO Box U1987, Perth WA6845, Australia
Andrew King
Curtin University of Technology
R. Narayanaswamy
Department of Mechanical Engineering, Curtin University of Technology, GPO Box U 1987, Perth, Western Australia

Краткое описание

This paper examines the thermal enhancement potential of a novel technique for cooling a heated surface by fluid jet impingement. Instead of using a conventional flat impinging surface, the fluid jet is directed into a coaxial cylindrical cavity embedded in the heated surface. A numerical study is performed to obtain the heat and fluid flow characteristics and to examine the parametric influence arising from the modified surface geometry. Comparisons are made with the thermal performance of conventional fluid jet impingement at a smooth heated surface. The results indicate a several-fold increase in heat transfer due to the presence of a cavity beneath the jet. It is noted that the degree of enhancement is primarily dependent on the cavity depth and jet Reynolds number.

Ключевые слова: jet impingment, cavity, heat transfer enhancement

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