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WALL-MODELLED LARGE EDDY SIMULATIONS OF AXIAL TURBINE RIM SEALING

Palermo, Donato M., Gao, Feng, Amirante, Dario, Chew, John W., Revert, Anna Bru and Beard, Paul F. (2020) WALL-MODELLED LARGE EDDY SIMULATIONS OF AXIAL TURBINE RIM SEALING In: ASME Turbomachinery Technical Conference & Exposition, 22-26 June 2020, London, UK.

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Abstract

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: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
NameEmailORCID
Palermo, Donato M.d.palermo@surrey.ac.uk
Gao, Fengf.gao@surrey.ac.uk
Amirante, DarioD.Amirante@surrey.ac.uk
Chew, John W.J.Chew@surrey.ac.uk
Revert, Anna Bru
Beard, Paul F.
Date : 9 April 2020
Funders : EPSRC, Innovate UK, Rolls Royce plc.
Copyright Disclaimer : Copyright © 2020 by Rolls-Royce plc
Depositing User : James Marshall
Date Deposited : 01 Jun 2020 09:58
Last Modified : 22 Jun 2020 02:08
URI: http://epubs.surrey.ac.uk/id/eprint/857019

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