Accession Number : ADA193109

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

Descriptive Note : Final rept. Sep 84-Aug 87,

Corporate Author : SCIENTIFIC RESEARCH ASSOCIATES INC GLASTONBURY CT

Personal Author(s) : Davoudzadeh, F ; Liu, N S ; Shamroth, S J ; Thoren, S J

PDF Url : ADA193109

Report Date : Dec 1987

Pagination or Media Count : 158

Abstract : 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.

Descriptors :   *CASCADES(FLUID DYNAMICS), *DISTORTION, *INLETS, *NAVIER STOKES EQUATIONS, *COMPRESSORS, COMPUTATIONS, COMPUTER PROGRAMS, FLOW FIELDS, MATHEMATICAL MODELS, NUMERICAL ANALYSIS, ROTATION, STALLING, STEADY FLOW, STEADY STATE, TIME DEPENDENCE

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE