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

[+] Author and Article Information
J. J. Adamczyk

NASA Lewis Research Center, Brook Park, OH 44135

M. L. Celestina

Department of Aeromechanics, Sverdrup Technology, Inc., Brook Park, OH 44135

Jen Ping Chen

NSF Engineering Research Center, Mississippi State University, Mississippi State, MS 39762

J. Turbomach 118(1), 88-95 (Jan 01, 1996) (8 pages) doi:10.1115/1.2836611 History: Received February 18, 1994; Online January 29, 2008


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 © 1996 by The American Society of Mechanical Engineers
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