Accurate prediction of metal temperatures, blade tip and seal clearances in high pressure compressor and turbine air systems leads to dramatic improvements in overall aero-engine efficiency and component life. Fast transients during an engine flight profile may introduce large changes in geometry between adjacent rotor and stator components. The changing dynamics in a few critical seals and interfaces can change the dynamics of the entire engine, compromising efficiency, integrity and long service life. In this paper we present results of a coupled aero-thermo-mechanical transient simulation of a high pressure turbine assembly throughout an engine flight cycle. The fluid and solid model geometry is approximated as 2D axisymmetric. The problem, formulated as a four field coupled multiphysics system of equations, is simplified using a quasi-steady state assumption: the transient thermal solid problem is coupled to a sequence of steady fluid problems and static structural problems. The predicted results compare well with the experimental measurements over the entire fluid-solid interface. We show improvement in transient predictions isolating the effects of the solid domain deformation. The remaining transient error is linked to temporal uncertainties in the fluid model inlet boundary conditions which were taken as a spatial average of the main annulus flow conditions.
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ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition
June 13–17, 2016
Seoul, South Korea
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-4978-1
PROCEEDINGS PAPER
Aero-Thermo-Mechanical Modelling and Validation of Transient Effects in a High Pressure Turbine Internal Air System
Vlad Ganine,
Vlad Ganine
University of Surrey, Guildford, UK
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Dario Amirante,
Dario Amirante
University of Surrey, Guildford, UK
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Nicholas J. Hills
Nicholas J. Hills
University of Surrey, Guildford, UK
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Vlad Ganine
University of Surrey, Guildford, UK
Dario Amirante
University of Surrey, Guildford, UK
Nicholas J. Hills
University of Surrey, Guildford, UK
Paper No:
GT2016-57739, V05AT15A030; 12 pages
Published Online:
September 20, 2016
Citation
Ganine, V, Amirante, D, & Hills, NJ. "Aero-Thermo-Mechanical Modelling and Validation of Transient Effects in a High Pressure Turbine Internal Air System." Proceedings of the ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. Volume 5A: Heat Transfer. Seoul, South Korea. June 13–17, 2016. V05AT15A030. ASME. https://doi.org/10.1115/GT2016-57739
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