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TECHNICAL PAPERS

A Converging Slot-Hole Film-Cooling Geometry—Part 2: Transonic Nozzle Guide Vane Heat Transfer and Loss

[+] Author and Article Information
J. E. Sargison

School of Engineering, University of Tasmania, Hobart, Tasmania 7001, Australiae-mail: jane.sargison@utas.edu.au

S. M. Guo, M. L. G. Oldfield

Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK

G. D. Lock

Department of Mechanical Engineering, University of Bath, Bath BA2 7AY, UK

A. J. Rawlinson

Rolls Royce plc, Derby DE24 8BJ, UK

J. Turbomach 124(3), 461-471 (Jul 10, 2002) (11 pages) doi:10.1115/1.1459736 History: Received October 23, 2000; Online July 10, 2002
Copyright © 2002 by ASME
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References

Figures

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Basic console configuration
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Uni Graphics surface definition of two console film-cooling holes
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Photograph of prototype NGV section, manufactured by stereolithography, showing three rows of console cooling holes
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Schematic diagram of the CHTT
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Fanned NGV film-cooling hole configuration showing replacement of fan-shaped cooling hole rows with console rows
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Surface temperature versus hue for a pixel
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CHTT experimental temperature histories
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Thermocouple temperature trace with ramp and step curve fits applied
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Heat flux trace obtained from surface thermocouple
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Adiabatic wall temperature distribution
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Comparison of data fits
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Console NGV pressure surface with two rows of console film-cooling holes
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Console NGV suction surface
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Film-cooling effectiveness for air at engine conditions versus foreign gas at ambient conditions 21
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Adiabatic effectiveness at engine conditions, suction surface
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Heat transfer coefficient at engine conditions, suction surface
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Predicted heat flux at engine conditions, suction surface
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Adiabatic effectiveness at engine conditions, pressure surface
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Heat transfer coefficient at engine conditions, pressure surface
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Predicted heat flux at engine conditions, pressure surface
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Normalized total pressure
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Comparison of aerodynamic loss for four cooling configurations, normalized by loss without film cooling

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