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

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.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1987
Accession Number
ADA193109

Entities

People

  • F. Davoudzadeh
  • N. S. Liu
  • S. J. Thoren
  • S. J.. Shamroth

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Air Force
  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Difference Equations
  • Differential Equations
  • Equations
  • Equations Of Motion
  • Fluid Dynamics
  • Navier Stokes Equations
  • Partial Differential Equations
  • Pressure Distribution
  • Scientific Research
  • Three Dimensional
  • Turbines
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Computational Fluid Dynamics (CFD)