Experimental measurements from a new single stage turbine are presented. The turbine has 26 vanes and 59 rotating blades with a design point stage expansion ratio of 2.5 and vane exit Mach number of 0.96. A variable sealing flow is supplied to the disk cavity upstream of the rotor and then enters the annulus through a simple axial clearance seal situated on the hub between the stator and rotor. Measurements at the annulus hub wall just downstream of the vanes show the degree of circumferential pressure variation. Further pressure measurements in the disk cavity indicate the strength of the swirling flow in the cavity, and show the effects of mainstream gas ingestion at low sealing flows. Ingestion is further quantified through seeding of the sealing air with nitrous oxide or carbon dioxide and measurement of gas concentrations in the cavity. Interpretation of the measurements is aided by steady and unsteady computational fluid dynamics solutions, and comparison with an elementary model of ingestion.
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July 2003
Technical Papers
Measurement and Analysis of Ingestion Through a Turbine Rim Seal
O. Gentilhomme,
O. Gentilhomme
Thermo-Fluid Mechanics Research Centre, University of Sussex, Brighton, East Sussex, BN1 9QT UK
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N. J. Hills,
N. J. Hills
Thermo-Fluid Mechanics Research Centre, University of Sussex, Brighton, East Sussex, BN1 9QT UK
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A. B. Turner,
A. B. Turner
Thermo-Fluid Mechanics Research Centre, University of Sussex, Brighton, East Sussex, BN1 9QT UK
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J. W. Chew
J. W. Chew
Fluids Research Centre, School of Engineering, University of Surrey, Guildford, Surrey, GU2 7XH UK
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O. Gentilhomme
Thermo-Fluid Mechanics Research Centre, University of Sussex, Brighton, East Sussex, BN1 9QT UK
N. J. Hills
Thermo-Fluid Mechanics Research Centre, University of Sussex, Brighton, East Sussex, BN1 9QT UK
A. B. Turner
Thermo-Fluid Mechanics Research Centre, University of Sussex, Brighton, East Sussex, BN1 9QT UK
J. W. Chew
Fluids Research Centre, School of Engineering, University of Surrey, Guildford, Surrey, GU2 7XH UK
Contributed by the International Gas Turbine Institute and presented at the International Gas Turbine and Aeroengine Congress and Exhibition, Amsterdam, The Netherlands, June 3–6, 2002. Manuscript received by the IGTI January 25, 2002. Paper No. 2002-GT-30481. Review Chair: E. Benvenuti.
J. Turbomach. Jul 2003, 125(3): 505-512 (8 pages)
Published Online: August 27, 2003
Article history
Received:
January 25, 2002
Online:
August 27, 2003
Citation
Gentilhomme , O., Hills , N. J., Turner, A. B., and Chew, J. W. (August 27, 2003). "Measurement and Analysis of Ingestion Through a Turbine Rim Seal ." ASME. J. Turbomach. July 2003; 125(3): 505–512. https://doi.org/10.1115/1.1556411
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