NDLI: Mainstream Aerodynamic Effects due to Wheelspace Coolant Injection in a High-Pressure Turbine Stage: Part I — Aerodynamic Measurements in the Stationary Frame

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Mclean, Christopher Camci, Cengiz Glezer, Boris
Copyright Year	2001
Abstract	The relative aerodynamic and performance effects associated with rotor – NGV gap coolant injections were investigated in the Axial Flow Turbine Research Facility (AFTRF) of The Pennsylvania State University. This study quantifies the effects of the coolant injection on the aerodynamic performance of the turbine for radial cooling, impingement cooling in the wheelspace cavity and root injection. Overall, it was found that even a small quantity (1%) of cooling air can have significant effects on the performance character and exit conditions of the high pressure stage. Parameters such as the total-to-total efficiency, total pressure loss coefficient, and three-dimensional velocity field show local changes in excess of 5%, 2%, and 15% respectively. It is clear that the cooling air disturbs the inlet end-wall boundary layer to the rotor and modifies secondary flow development thereby resulting in large changes in turbine exit conditions.
Sponsorship	International Gas Turbine Institute
File Format	PDF
ISBN	9780791878521
DOI	10.1115/2001-GT-0119
Volume Number	Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration
Conference Proceedings	ASME Turbo Expo 2001: Power for Land, Sea, and Air
Language	English
Publisher Date	2001-06-04
Publisher Place	New Orleans, Louisiana, USA
Access Restriction	Subscribed
Subject Keyword	High pressure (physics) Cavities Cooling Impingement cooling Rotors Coolants Nozzle guide vanes Flow (dynamics) Pressure Turbines Axial flow Boundary layers
Content Type	Text
Resource Type	Article

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