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Numerical Analysis of the Wave Topping Unit for Small Turbojet

[+] Author Affiliations
Janusz Piechna, Staniszewski Marcin

Warsaw University of Technology, Warsaw, Poland

Rafael Cerpa

Universidad de San Buenaventura Bogotá, Bogotá, Colombia

Pezhman Akbari

Columbia University, New York, NY

Norbert Müller

Michigan State University, East Lansing, MI

Paper No. GT2010-23064, pp. 319-327; 9 pages
doi:10.1115/GT2010-23064
From:
  • ASME Turbo Expo 2010: Power for Land, Sea, and Air
  • Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Education; Electric Power; Manufacturing Materials and Metallurgy
  • Glasgow, UK, June 14–18, 2010
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4396-3 | eISBN: 978-0-7918-3872-3
  • Copyright © 2010 by ASME

abstract

The paper is focused on the numerical analysis of a wave topping unit used in a small turbojet engine. The analysis focuses on a four-port reverse flow (RF) wave rotor. The special feature of the considered wave rotor is its very high rotational speed. The wave rotor is connected directly with the common shaft between compressor and turbine, thus, the effects of Coriolis accelerations become important. In this study, first a one-dimensional model is used to estimate geometry of the wave rotor and port timings. Then, multi-dimensional analysis models are employed to predict the different flow characteristics inside the wave rotor channels. Three-dimensional flow features that reduce machine performance and influence rotor blade and duct wall thermal loads are identified.

Copyright © 2010 by ASME

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