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Wake-Induced Unsteady Flows: Their Impact on Rotor Performance and Wake Rectification PUBLIC ACCESS

[+] Author Affiliations
J. J. Adamczyk

NASA Lewis Research Center, Brook Park, OH

M. L. Celestina

Sverdrup Technology, Inc., Brook Park, OH

Jen Ping Chen

Mississippi State University, Mississippi State, MS

Paper No. 94-GT-219, pp. V001T01A078; 9 pages
doi:10.1115/94-GT-219
From:
  • ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 1: Turbomachinery
  • The Hague, Netherlands, June 13–16, 1994
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7883-5
  • Copyright © 1994 by ASME

abstract

The impact of wake-induced unsteady flows on blade row performance and the wake rectification process is examined by means of numerical simulation. The passage of a stator wake through a downstream rotor is first simulated using a three dimensional unsteady viscous flow code. The results from this simulation are used to define two steady state inlet conditions for a three dimensional viscous flow simulation of a rotor operating in isolation. The results obtained from these numerical simulations are then compared to those obtained from the unsteady simulation both to quantify the impact of the wake-induced unsteady flow field on rotor performance and to identify the flow processes which impact wake rectification. Finally, the results from this comparison study are related to an existing model which attempts to account for the impact of wake-induced unsteady flows on the performance of multistage turbomachinery.

Copyright © 1994 by ASME
Topics: Wakes , Rotors , Unsteady flow
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