Passive shroud cooling concepts for HP turbines: experimental investigations

Kanjirakkad, Vasudevan, Thomas, Richard, Hodson, Howard, Janke, Erik, Haselbach, Frank and Whitney, Chris (2006) Passive shroud cooling concepts for HP turbines: experimental investigations. In: ASME Turbo Expo 2006: Power for Land, Sea, and Air, Volume 3: Heat Transfer, Parts A and B, Barcelona, Spain, May 8–11, 2006. American Society of Mechanical Engineers (ASME), pp. 1065-1074. ISBN 079184238X

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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 whilst employing significantly lower amounts of coolant.

Item Type: Book Section
Additional Information: Paper No. GT2006-91250
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ0266 Turbines. Turbomachines (General)
Depositing User: Vasudevan Kanjirakkad
Date Deposited: 05 Jul 2012 09:42
Last Modified: 05 May 2015 07:13
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