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Details of Grant 

EPSRC Reference: GR/M08868/01
Title: PRESSURE DROP AND HEAT TRANSFER IN PRE-SWIRL COOLING- AIR SYSTEMS OF GAS TURBINES
Principal Investigator: Owen, Professor J M
Other Investigators:
Lock, Professor G Wilson, Dr M
Researcher Co-Investigators:
Project Partners:
European Gas Turbines Ltd
Department: Mechanical Engineering
Organisation: University of Bath
Scheme: Standard Research (Pre-FEC)
Starts: 08 February 1999 Ends: 07 February 2002 Value (£): 121,887
EPSRC Research Topic Classifications:
Heat & Mass Transfer
EPSRC Industrial Sector Classifications:
Energy
Related Grants:
Panel History:  
Summary on Grant Application Form
Pre-swirl are used to supply the cooling air to the blades in gas turbines. In the direct-transfer system, the air is supplied at a large radius, through stationary pre-swirl nozzles, and flows directly into the blade-cooling holes in the rotating turbine disc. In the cover-plate system, the pre-swirl air is supplied at a small radius and flows radially outward in the space between the disc and a cover-plate attached to it. In the proposed research, both stationary and rotating cover-plate rigs will be used to determine the effect of geometry on the pressure drop between the pre-swirl nozzles and the blade cooling holes. By reducing the pressure drop, the pre-swirl ration can be increased with a consequent reduction in the temperature of the blade-cooling air. Transient heat transfer tests will be conducted in the rotating-disc rig for both direct-transfer and cooling plate systems. In particular, thermochromic liquid crystals and thin-film platinum resistance thermometers will be used to measure the temperature distribution and the local Nusselt numbers in the critical area around the blade-cooling holes. The experimental data will then be used to validate CFD codes and to improve the design procedures for pre-swirl cooling systems.
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Organisation Website: http://www.bath.ac.uk