A Navier-Stokes Study of Cascade Flow Fields Including Inlet Distortion and Rotating Stall

A two-dimensional, unsteady, Navier-Stokes computer code has been developed and applied to general cascade problems including inlet distortion and rotating stall. The code allows an arbitrary number of passages with periodicity conditions applied below the first and above the last passage, thus allo...

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Bibliographic Details
Main Authors: Davoudzadeh, F, Liu, N S, Shamroth, S J, Thoren, S J
Format: Report
Language:English
Subjects:
CASCADES(FLUID DYNAMICS)
Compressor inlets
COMPRESSORS
COMPUTATIONS
COMPUTER PROGRAMS
DISTORTION
FLOW FIELDS
Fluid Mechanics
INLETS
MATHEMATICAL MODELS
NAVIER STOKES EQUATIONS
NUMERICAL ANALYSIS
PE65502f
ROTATION
STALLING
STEADY FLOW
STEADY STATE
TIME DEPENDENCE
WUAFWAL30052020
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Summary:A two-dimensional, unsteady, Navier-Stokes computer code has been developed and applied to general cascade problems including inlet distortion and rotating stall. The code allows an arbitrary number of passages with periodicity conditions applied below the first and above the last passage, thus allowing flows in the computational domain to differ on a passage-by-passage basis. Calculations were performed for both C-grid and H-grid coordinate systems for single passage steady flows, multiple passage flows with steady and time-dependent inlet distortions and for multiple passage flows with a disturbance first imposed and then removed. This latter set of calculations demonstrated the ability of the procedure to simulate rotating stall flow fields. Calculations for conditions of incipient rotating stall showed good agreement with data for a J-79 stator set. Keywords: Navier-Stokes equations, Numerical simulation, Inlet distortion, Rotating stall.