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Transient Aero-Thermo-Mechanical Multidimensional Analysis of a High Pressure Turbine Assembly Through a Square Cycle

Ganine, Vlad, Chew, John, Hills, Nicholas, Mohamed, Sulfi N. and Miller, Matthew M. (2020) Transient Aero-Thermo-Mechanical Multidimensional Analysis of a High Pressure Turbine Assembly Through a Square Cycle In: ASME Turbomachinery Technical Conference & Exposition (Turbo Expo 2020), 22-26 Jun 2020, ExCeL London Convention Center in London, United Kingdom.

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Better understanding and more accurate prediction of heat transfer and cooling flows in aero engine components in steady and transient operating regimes are essential to modern engine designs aiming at reduced cooling air consumption and improved engine efficiencies. This paper presents a simplified coupled transient analysis methodology that allows assessment of the aerothermal and thermomechanical responses of engine components together with cooling air mass flow, pressure and temperature distributions in an automatic fully integrated way. This is achieved by assembling a fluid network with contribution of components of different geometrical dimensions coupled to each other through dimensionally heterogeneous interfaces. More accurate local flow conditions, heat transfer and structural displacement are resolved on a smaller area of interest with multidimensional surface coupled CFD/FE codes. Contributions of the whole engine air-system are predicted with a faster mono dimensional flow network code. Matching conditions at the common interfaces are enforced at each time step exactly by employing an efficient iterative scheme. The coupled simulation is performed on an industrial high pressure turbine disk component run through a square cycle. Predictions are compared against the available experimental data. The paper proves the reliability and performance of the multidimensional coupling technique in a realistic industrial setting. The results underline the importance of including more physical details into transient thermal modelling of turbine engine components.

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
Mohamed, Sulfi N.
Miller, Matthew M.
Date : 22 September 2020
Funders : Rolls-Royce plc, Clean Sky Joint Technology Initiative
Copyright Disclaimer : Copyright © 2020 by Rolls-Royce plc
Related URLs :
Additional Information : Paper no. GT2020-15667. (Originally scheduled for 22-26 June in London, this conference was actually rescheduled as a 'virtual' online conference on 21-25 September.)
Depositing User : Clive Harris
Date Deposited : 05 Jun 2020 16:30
Last Modified : 22 Sep 2020 02:08

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