The role of tip clearance in high-speed fan stall

Journal Article · Fri Jan 01 04:00:00 EST 1993 · Journal of Turbomachinery; (United States)

DOI:https://doi.org/10.1115/1.2929212· OSTI ID:5942716

Adamczyk, J J ^[1]; Celestina, M L ^[2]; Greitzer, E M ^[3]

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1. NASA Lewis Research Center, Cleveland, OH (United States)
2. Sverdrup Tech., Inc., Cleveland, OH (United States)
3. Massachusetts Institute of Technology, Cambridge, MA (United States)

A numerical experiment has been carried out to define the near-stall casing endwall flow field 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-passage 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 that 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 that controls the flow processes leading to stall.

• OSTI ID: 5942716
• Journal Information: Journal of Turbomachinery; (United States), Journal Name: Journal of Turbomachinery; (United States) Vol. 115:1; ISSN JOTUEI; ISSN 0889-504X
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330103* -- Internal Combustion Engines-- Turbine
COMPRESSORS
COMPUTERIZED SIMULATION
ENGINES
FLUID FLOW
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GAS TURBINE ENGINES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MATHEMATICAL MODELS
SIMULATION
STABILIZATION
VORTEX FLOW