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Palermo, Donato M., Gao, Feng, Chew, John W. and Beard, Paul F. (2019) EFFECT OF ANNULUS FLOW CONDITIONS ON TURBINE RIM SEAL INGESTION In: Turbo Expo 2019: Turbomachinery Technical Conference & Exposition, 17-21 Jun 2019, Phoenix Convention Center, Phoenix, AZ, USA.

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A systematic study of sealing performance for a chute style turbine rim seal using URANS methods is reported. This extends previous studies from a configuration without external flow in the main annulus to cases with a circumferentially uniform axial flow and vane generated swirling annulus flow (but without rotor blades). The study includes variation of the mean seal-to-rotor velocity ratio, main annulus-to-rotor velocity ratio, and seal clearance. The effects on the unsteady flow structures and the degree of main annulus flow ingestion into the rim seal cavity are examined. Sealing effectiveness is quantified by modeling a passive scalar, and the timescales for the convergence of this solution are considered. It has been found that intrinsic flow unsteadiness occurs in most cases, with the presence of vanes and external flow modifying, the associated flow structures and frequencies. Some sensitivities to the annulus flow conditions are identified. The circumferential pressure asymmetry generated by the vanes has a clear influence on the flow structure but does not lead to higher ingestion rates than the other conditions studied.

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
Palermo, Donato
Chew, John
Beard, Paul F.
Date : 17 June 2019
Funders : Engineering and Physical Sciences Research Council (EPSRC), ATI, Rolls-Royce plc
Copyright Disclaimer : Copyright © 2019 by Rolls-Royce plc
Related URLs :
Depositing User : Diane Maxfield
Date Deposited : 07 Jun 2019 14:02
Last Modified : 06 Sep 2019 09:35

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