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TECHNOLOGY REVIEW

A Review of Shaped Hole Turbine Film-Cooling Technology

[+] Author and Article Information
Ronald S. Bunker

General Electric Global Research Center, Niskayuna, NYA Review of Shaped Hole Turbine Film-Cooling Technology

J. Heat Transfer 127(4), 441-453 (Mar 30, 2005) (13 pages) doi:10.1115/1.1860562 History: Received January 04, 2004; Revised May 15, 2004; Online March 30, 2005
Copyright © 2005 by ASME
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References

Figures

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Ideal tangential slot film cooling
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Schematic of slot-like film cooling regions in turbine
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Modern HPT film cooled blade and vane
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Catalogue (partial) of shaped film literature 383940414243
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Defined geometries for four types of shaped film holes
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Centerline effectiveness downstream of single round or shaped hole (reprinted from 3 with permission from Elsevier)
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Centerline effectiveness as a function of blowing rate; row of holes three-dimensional spacing (reprinted from 3 with permission from Elsevier)
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Turbulence intensity for hole centerline plane (top) and transverse location X/D=4 plane (bottom); reproduced from 5
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Shaped film hole LIF images at transverse planes (reproduced from 6)
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Oil and dye surface traces for round and shaped film holes (reproduced from 7 and 8, respectively)
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Oil and dye surface traces for compound angle, shaped film holes (reproduced from 8)
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Summary of heat transfer coefficient enhancements with shaped film holes
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Effect of freestream turbulence intensity (reproduced from 31)
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Cascade suction side film effectiveness with shaped film (present test surface photo)
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Proposed alternative film holes shapes

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