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RESEARCH PAPERS

The Effect of Disk Geometry on Heat Transfer in a Rotating Cavity With a Radial Outflow of Fluid

[+] Author and Article Information
P. R. Farthing, J. M. Owen

Thermo-Fluid Mechanics Research Centre, School of Engineering and Applied Sciences, University of Sussex, Brighton, Sussex, United Kingdom

J. Eng. Gas Turbines Power 110(1), 70-77 (Jan 01, 1988) (8 pages) doi:10.1115/1.3240089 History: Received February 17, 1987; Online October 15, 2009

Abstract

Flow visualization and heat transfer measurements have been made in a cavity comprising two nonplane disks of 762 mm diameter and a peripheral shroud, all of which could be rotated up to 2000 rpm. “Cobs,” made from a lightweight foam material and shaped to model the geometry of turbine disks, were attached to the center of each disk. Cooling air at flow rates up to 0.1 kg/s entered the cavity through the center of the “upstream” disk and left via holes in the shroud. The flow structure was found to be similar to that observed in earlier tests for the plane-disk case: a source region, Ekman layers, sink layer, and interior core were observed by flow visualization. Providing the source region did not fill the entire cavity, solutions of the turbulent integral boundary-layer equations provided a reasonable approximation to the Nusselt numbers measured on the heated “downstream” disk.

Copyright © 1988 by ASME
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