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Wall Modelled Large Eddy Simulations of Axial Turbine Rim Sealing

Palermo, Donato M., Gao, Feng, Amirante, Dario, Chew, John, Revert, Anna Bru and Beard, Paul F. (2020) Wall Modelled Large Eddy Simulations of Axial Turbine Rim Sealing Journal of Engineering for Gas Turbines and Power.

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This paper presents WMLES simulations of a chute type turbine rim seal. Configurations with an axisymmetric annulus flow and with nozzle guide vanes fitted (but without rotor blades) are considered. The passive scalar concentration solution and WMLES are validated against available data in the literature for uniform convection and a rotor-stator cavity flow. The WMLES approach is shown to be effective, giving significant improvements over an eddy viscosity turbulence model, in prediction of rim seal effectiveness compared to research rig measurements. WMLES requires considerably less computational time than wall-resolved LES, and has the potential for extension to engine conditions. All WMLES solutions show rotating inertial waves in the chute seal. Good agreement between WMLES and measurements for sealing effectiveness in the configuration without vanes is found. For cases with vanes fitted the WMLES simulation shows less ingestion than the measurements, and possible reasons are discussed.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
Palermo, Donato
Revert, Anna Bru
Beard, Paul F.
Date : 2020
Funders : Engineering and Physical Sciences Research Council (EPSRC), Innovate UK, Rolls-Royce plc
Copyright Disclaimer : Copyright © 2020 by Rolls-Royce plc
Related URLs :
Depositing User : Clive Harris
Date Deposited : 07 Sep 2020 09:42
Last Modified : 07 Sep 2020 09:42

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