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Evaluation of the Interaction Losses in a Transonic Turbine HP Rotor / LP Vane Configuration FREE

[+] Author Affiliations
I. K. Jennions

G. E. Aircraft Engines, Cincinnati, OH

J. J. Adamczyk

NASA Lewis Research Center, Cleveland, OH

Paper No. 95-GT-299, pp. V001T01A083; 17 pages
doi:10.1115/95-GT-299
From:
  • ASME 1995 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 1: Turbomachinery
  • Houston, Texas, USA, June 5–8, 1995
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7878-1
  • Copyright © 1995 by ASME

abstract

Transonic turbine rotors produce shock waves, wakes, tip leakage flows and other secondary flows that the downstream stators have to ingest. While the physics of wake ingestion and shock interaction have been studied quite extensively, few ideas for reducing the aerodynamic interaction losses have been forthcoming. This paper aims to extend previously reported work performed by GE Aircraft Engines in this area. It reports on both average-passage (steady) and unsteady 3D numerical simulations of a candidate design to shed light on the interaction loss mechanisms and evaluate the design. The results from these simulations are first shown against test data for a Baseline configuration to engender confidence in the numerical approach. Simulations with the proposed newly designed rotor are then performed to show the trade-offs that are being made in such designs. The new rotor does improve the overall efficiency of the group and physical explanations are presented based on examining entropy production.

Copyright © 1995 by ASME
Topics: Rotors , Turbines
This article is only available in the PDF format.

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