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Comparison of steady and unsteady secondary flows in a turbine stator cascadeThe effect of periodic rotor wakes on the secondary flow structure in a turbine stator cascade was investigated. A mechanism simulated the wakes shed from rotor blades by passing cylindrical rods across the inlet to a linear cascade installed in a recirculating water flow loop. Velocity measurements showed a passage vortex, similar to that seen in steady flow, during the time associated with undisturbed fluid. However, as the rotor wake passed through the blade row, a large crossflow toward the suction surface was observed in the midspan region. This caused the development of two large areas of circulation between the midspan and endwall regions, significantly distorting and weakening the passage vortices.
Document ID
19900036745
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hebert, Gregory J.
(Purdue Univ. West Lafayette, IN, United States)
Tiederman, William G.
(Purdue University West Lafayette, IN, United States)
Date Acquired
August 14, 2013
Publication Date
June 1, 1989
Subject Category
Aerodynamics
Report/Patent Number
ASME PAPER 89-GT-79
Accession Number
90A23800
Funding Number(s)
CONTRACT_GRANT: N00014-87-G-0040
Distribution Limits
Public
Copyright
Other

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