Heat Transfer and Flow Characteristics of an Engine Representative Impingement Cooling System

[+] Author and Article Information
Changmin Son, David Gillespie, Peter Ireland

Department of Engineering Science, University of Oxford, Oxford, OX1 3PJ, United Kingdom

Geoffrey M. Dailey

Rolls-Royce plc, Derby, DE24 8BJ, United Kingdome-mail: geoffrey.dailey@rolls-royce.com

J. Turbomach 123(1), 154-160 (Feb 01, 2000) (7 pages) doi:10.1115/1.1328087 History: Received February 01, 2000
Copyright © 2001 by ASME
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Nozzle guide vane cooling scheme 15
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Impingement cooling system with staggered hole array and nomenclature
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Schematic of test facility
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Captured image and selected area for processing
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Nusselt number distribution on target surface under uniform impingement array at Rej avg=28,870
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Nusselt number distribution on target surface under nonuniform impingement array at Rej avg=29,440
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Variation of local Nusselt number along the jet centerlines: uniform hole array
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Variation of local Nusselt number along the jet centerlines: nonuniform hole array
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Spanwise-averaged Nusselt number distribution: (a) uniform hole array; (b) nonuniform hole array
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Comparison of total average Nusselt number
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Heat flux analysis and adiabatic wall temperature
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Simple model of wall cooling
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Heat flow rate distribution: uniform array, Rej avg=28,870
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Shear stress visualization on a smooth target plate
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Comparison of Gc/Gj distribution through the impingement channel
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Static pressure distribution through the impingement channel: nonuniform array




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