The cooling of rotor shrouds in the first stage of a high-pressure turbine requires special attention as flatter turbine inlet temperature profiles and more highly loaded blades result in increased thermal and mechanical stresses. The use of film cooling and/or internal convective cooling makes the rotor shroud heavier and oversized, restricting the maximum rotational speed. Alternative methods are, therefore, sought to achieve improved cooling of the shroud. This paper discusses the low-speed experimental investigation of two “passive” cooling concepts known as “rail cooling” and “platform cooling.” It has been shown experimentally that the modified cooling method, namely, the platform cooling, substantially improves the rotor shroud coolant distribution in the critical areas while employing significantly lower amounts of coolant.
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January 2008
Research Papers
Passive Shroud Cooling Concepts for HP Turbines: Experimental Investigations
Howard Hodson,
Howard Hodson
Whittle Laboratory,
e-mail: kpv20@cam.ac.uk
University of Cambridge
, Cambridge CB3 0DY, United Kingdom
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Erik Janke,
Erik Janke
Turbine Aerodynamics & Cooling
, Rolls-Royce Deutschland, D-15827 Dahlewitz, Germany
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Frank Haselbach,
Frank Haselbach
Turbine Aerodynamics & Cooling
, Rolls-Royce Deutschland, D-15827 Dahlewitz, Germany
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Chris Whitney
Chris Whitney
ALSTOM Power Technology Centre
, Cambridge Road, Whetstone, Leicester LE8 6LH, United Kingdom
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Howard Hodson
Whittle Laboratory,
University of Cambridge
, Cambridge CB3 0DY, United Kingdome-mail: kpv20@cam.ac.uk
Erik Janke
Turbine Aerodynamics & Cooling
, Rolls-Royce Deutschland, D-15827 Dahlewitz, Germany
Frank Haselbach
Turbine Aerodynamics & Cooling
, Rolls-Royce Deutschland, D-15827 Dahlewitz, Germany
Chris Whitney
ALSTOM Power Technology Centre
, Cambridge Road, Whetstone, Leicester LE8 6LH, United KingdomJ. Turbomach. Jan 2008, 130(1): 011017 (9 pages)
Published Online: January 28, 2008
Article history
Received:
June 15, 2006
Revised:
January 11, 2007
Published:
January 28, 2008
Citation
Kanjirakkad, V., Thomas, R., Hodson, H., Janke, E., Haselbach, F., and Whitney, C. (January 28, 2008). "Passive Shroud Cooling Concepts for HP Turbines: Experimental Investigations." ASME. J. Turbomach. January 2008; 130(1): 011017. https://doi.org/10.1115/1.2749300
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