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CFD Investigation of a Fluidic Device for Modulation of Aero-Engine Cooling Air

[+] Author Affiliations
Bharat Koli, John W. Chew, Nick J. Hills

University of Surrey, Guildford, UK

Timothy Scanlon

Rolls-Royce plc, Derby, UK

Paper No. GT2014-26221, pp. V05CT16A025; 12 pages
doi:10.1115/GT2014-26221
From:
  • ASME Turbo Expo 2014: Turbine Technical Conference and Exposition
  • Volume 5C: Heat Transfer
  • Düsseldorf, Germany, June 16–20, 2014
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4573-8
  • Copyright © 2014 by Rolls-Royce plc

abstract

The quantity of cooling air delivered by the secondary air system to various engine components is usually fixed by cooling requirements at the most arduous operating condition in the flight cycle. Modulation of cooling air would allow optimization of cooling supply at different flight cycle conditions, giving significant performance benefits. Switched vortex valves (SVV) have been proposed for control of air systems [1]. An important characteristics of this device is the absence of any moving part. This offers advantages compared to other systems. This report discusses the numerical study of a typical SVV. The study includes comparison of predicted results with available experimental data and prediction of switching characteristics of the device. In this study two turbulence models namely the Spalart-Allmaras model (SA) and Reynolds stress model (RSM) were used. The RSM showed a good agreement with measured mass flow rate and qualitative agreement with other experimental observations.

Copyright © 2014 by Rolls-Royce plc

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