Modern gas turbines are cooled using air diverted from the compressor. In a “direct-transfer” preswirl system, this cooling air flows axially across the wheel space from stationary preswirl nozzles to receiver holes located in the rotating turbine disk. The distribution of the local Nusselt number Nu on the rotating disk is governed by three nondimensional fluid-dynamic parameters: preswirl ratio , rotational Reynolds number , and turbulent flow parameter . This paper describes heat transfer measurements obtained from a scaled model of a gas turbine rotor-stator cavity, where the flow structure is representative of that found in the engine. The experiments reveal that Nu on the rotating disk is axisymmetric except in the region of the receiver holes, where significant two-dimensional variations have been measured. At the higher coolant flow rates studied, there is a peak in heat transfer at the radius of the preswirl nozzles associated with the impinging jets from the preswirl nozzles. At lower coolant flow rates, the heat transfer is dominated by viscous effects. The Nusselt number is observed to increase as either or increases.
Skip Nav Destination
Article navigation
October 2005
Technical Papers
Influence of Fluid Dynamics on Heat Transfer in a Preswirl Rotating-Disk System
Gary D. Lock,
Gary D. Lock
Department of Mechanical Engineering,
University of Bath
, Bath BA2 7AY, UK
Search for other works by this author on:
Michael Wilson,
Michael Wilson
Department of Mechanical Engineering,
University of Bath
, Bath BA2 7AY, UK
Search for other works by this author on:
J. Michael Owen
J. Michael Owen
Department of Mechanical Engineering,
University of Bath
, Bath BA2 7AY, UK
Search for other works by this author on:
Gary D. Lock
Department of Mechanical Engineering,
University of Bath
, Bath BA2 7AY, UK
Michael Wilson
Department of Mechanical Engineering,
University of Bath
, Bath BA2 7AY, UK
J. Michael Owen
Department of Mechanical Engineering,
University of Bath
, Bath BA2 7AY, UKJ. Eng. Gas Turbines Power. Oct 2005, 127(4): 791-797 (7 pages)
Published Online: March 1, 2004
Article history
Received:
October 1, 2003
Revised:
March 1, 2004
Citation
Lock, G. D., Wilson, M., and Owen, J. M. (March 1, 2004). "Influence of Fluid Dynamics on Heat Transfer in a Preswirl Rotating-Disk System." ASME. J. Eng. Gas Turbines Power. October 2005; 127(4): 791–797. https://doi.org/10.1115/1.1924721
Download citation file:
Get Email Alerts
Image-based flashback detection in a hydrogen-fired gas turbine using a convolutional autoencoder
J. Eng. Gas Turbines Power
Fuel Thermal Management and Injector Part Design for LPBF Manufacturing
J. Eng. Gas Turbines Power
An investigation of a multi-injector, premix/micromix burner burning pure methane to pure hydrogen
J. Eng. Gas Turbines Power
Related Articles
Direct-Transfer Preswirl System: A One-Dimensional Modular Characterization of the Flow
J. Eng. Gas Turbines Power (April,2005)
Heat Transfer Measurements Using Liquid Crystals in a Preswirl Rotating-Disk System
J. Eng. Gas Turbines Power (April,2005)
Cooling Air Temperature Reduction in a Direct Transfer Preswirl System
J. Eng. Gas Turbines Power (October,2004)
A Novel Cooling Method for Turbine Rotor-Stator Rim Cavities Affected by Mainstream Ingress
J. Eng. Gas Turbines Power (October,2005)
Related Chapters
Outlook
Closed-Cycle Gas Turbines: Operating Experience and Future Potential
Adding Surface While Minimizing Downtime
Heat Exchanger Engineering Techniques
Control and Operational Performance
Closed-Cycle Gas Turbines: Operating Experience and Future Potential