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The role of tip clearance in high-speed fan stallA numerical experiment has been carried out to define the near-stall casing endwall flowfield of a high-speed fan rotor. The experiment used a simulation code incorporating a simple clearance model, whose calibration is presented. The results of the simulation show that the interaction of the tip leakage vortex and the in-pasage shock plays a major role in determining the fan flow range. More specifically, the computations imply that it is the area increase of this vortex as it passes through the in-passage shock, which is the source of the blockage associated with stall. In addition, for fans of this type, it is the clearance over the forward portion of the fan blade which controls the flow processes leading to stall.
Document ID
19920032926
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Adamczyk, J. J.
(NASA Lewis Research Center Cleveland, OH, United States)
Celestina, M. L.
(NASA Lewis Research Center; Sverdrup Technology, Inc. Cleveland, OH, United States)
Greitzer, E. M.
(MIT Cambridge, MA, United States)
Date Acquired
August 15, 2013
Publication Date
June 1, 1991
Subject Category
Aerodynamics
Report/Patent Number
ASME PAPER 91-GT-83
Accession Number
92A15550
Funding Number(s)
CONTRACT_GRANT: NSG-3208
Distribution Limits
Public
Copyright
Other

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