Measurement of Heat Transfer and Flow Structures in a Closed Rotating Cavity

Richard Jackson, Hui Tang, James Scobie, Mike Owen, Gary Lock

Research output: Chapter or section in a book/report/conference proceedingChapter in a published conference proceeding

3 Citations (SciVal)


Buoyancy-induced flow occurs inside the rotating compressor cavities of gas turbines. These cavities are usually open at the inner radius, but in some industrial gas turbines, they are effectively closed. This paper presents measurements of the disc heat transfer and rotating flow structures in a closed cavity over a wide range of engine relevant conditions. These experimentally derived distributions of disc temperature and heat flux are the first of their kind to be published. The radial distribution of the non-dimensional disc temperature virtually collapsed onto a single curve over the full experimental range. There was a small, monotonic departure from this common curve with increasing Reynolds number; this was attributed to compressibility effects where the core temperature increases as the rotational speed increases. These results imply that, if compressibility effects are negligible, all rotating closed cavities should have a disc temperature distribution uniquely related to the geometry and disc material; this is of important practical use to the engine designer. Unsteady pressure sensors detected either three or four vortex pairs across the experimental range. The number of pairs changed with Grashof number, and the structures slipped relative to the rotating discs by less than 1% of the disc speed.
Original languageEnglish
Title of host publicationProceedings of the ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition
Subtitle of host publicationVolume 5B
Place of PublicationU. S. A.
ISBN (Electronic)9780791884980
Publication statusPublished - 2021
EventASME Turbo Expo 2021 -
Duration: 7 Jun 202111 Jun 2021

Publication series

NameProceedings of the ASME Turbo Expo


ConferenceASME Turbo Expo 2021

Bibliographical note

Funding Information:
This work was supported by the UK Engineering and Physical Sciences Research Council, under the grant number EP/P003702/1 in collaboration with the University of Surrey. The authors wish to thank Torquemeters Ltd (Northampton, UK) for their support with the rig design and build and acknowledge the helpful contributions of Dr Carl Sangan and Dr Oliver Pountney.

Publisher Copyright:
© 2021 by ASME.

ASJC Scopus subject areas

  • General Engineering


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