Numerical simulation of compressor endwall and casing treatment flow phenomena

Journal Article · Thu Jul 01 04:00:00 EDT 1993 · Journal of Turbomachinery; (United States)

DOI:https://doi.org/10.1115/1.2929280· OSTI ID:5991136

Crook, A J ^[1]; Greitzer, E M; Tan, C S ^[2]; Adamczyk, J J ^[3]

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1. Allison Gas Turbine Div., Indianapolis, IN (United States)
2. Massachusetts Inst. of Tech., Cambridge, MA (United States)
3. NASA Lewis Research Center, Cleveland, OH (United States)

A numerical study is presented of the flow in the endwall region of a compressor blade row, in conditions of operation with both smooth and grooved endwalls. The computations are first compared to velocity field measurements in a cantilevered stator/rotating hub configuration to confirm that the salient features are captured. Computations are then interrogated to examine the tip leakage flow structure since this is a dominant feature of the endwall region. In particular, the high blockage that can exist near the endwalls at the rear of a compressor blade passage appears to be directly linked to low total pressure fluid associated with the leakage flow. The fluid dynamic action of the grooved endwall, representative of the casing treatments that have been most successful in suppressing stall, is then simulated computationally and two principal effects are identified. One is suction of the low total pressure, high blockage fluid at the rear of the passage. The second is energizing of the tip leakage flow, most notably in the core of the leakage vortex, thereby suppressing the blockage at its source.

• OSTI ID: 5991136
• Journal Information: Journal of Turbomachinery; (United States), Journal Name: Journal of Turbomachinery; (United States) Vol. 115:3; ISSN JOTUEI; ISSN 0889-504X
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330103* -- Internal Combustion Engines-- Turbine
COMPRESSOR BLADES
COMPRESSORS
FLOW MODELS
FLUID FLOW
GAS COMPRESSORS
GAS FLOW
MATHEMATICAL MODELS
NUMERICAL SOLUTION