Passive shroud cooling concepts for HP turbines: experimental investigations

Kanjirakkad, Vasudevan, Thomas, Richard, Hodson, Howard, Janke, Erik, Haselbach, Frank and Whitney, Chris (2008) Passive shroud cooling concepts for HP turbines: experimental investigations. Journal of Turbomachinery, 130 (1). 011017. ISSN 0889-504X

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Abstract

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.

Item Type: Article
Keywords: turbines; blades; rotors; cooling
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 09:46
Last Modified: 13 Mar 2017 12:13
URI: http://sro.sussex.ac.uk/id/eprint/39910

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