Numerical Analysis of Turbulent Separated Subsonic Diffuser Flows

Abstract

A general finite difference formulation of the incompressible Navier- Stokes equations in terms of the vorticity and the stream function is presented for turbulent internal flows. Turbulent models such as algebraic eddy viscosity models, and the low Reynolds number two-equation k-epsilon models were systematically studied. Numerical solutions are presented for both separated and non-separated subsonic diffuser flows with either a sublayer coordinate stretching or a low of the wall matching procedure. Excellent agreement with experimental data is obtained for the fully developed channel flow. Agreement with data from an 8-deg conical diffuser is also good. The detailed flow-field structure for separated diffuser flows can be obtained including the prediction of the separation point.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1977
Accession Number
ADA036005

Entities

People

  • J. C. Chien

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Computational Fluid Dynamics
  • Computational Science
  • Diffusers
  • Equations
  • Flow Fields
  • Kinetic Energy
  • Mechanics
  • Navier Stokes Equations
  • Numerical Analysis
  • Pressure Distribution
  • Shear Stresses
  • Stresses
  • Subsonic Diffusers
  • Three Dimensional
  • Turbulent Flow
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Fluid Mechanics and Fluid Dynamics.