Numerical Solutions for a Cylindrical Laser Diffuser Flowfield

Abstract

Numerical solution to the diffusion of a supersonic flow through a cylindrical laser diffuser is approached in incorporating a modified two-layer Cebici-Smith algebraic eddy viscosity turbulence model into the compressible Navier-Stokes equations. The standard algebraic constants are made functions of the local adverse pressure gradient based on experimental values obtained in the research of Jobe, Hankey, Laserman, Sturek, and Waltrup and Schetz. This modification allows solution of the Navier-Stokes equations by MacCormack's time-splitting explicit numerical scheme for selected experimental flow conditions. This effort represents the first full Navier-Stokes solution that has accurately simulated the viscous-inviscid interactions present in a supersonic axisymmetric diffuser. Numerous previous attempts required artificial and arbitrary numerical control of the wall boundary layers to achieve convergence. Theses.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1990
Accession Number
ADA223025

Entities

People

  • James A. Horkovich

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Creep
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Heat Transfer
  • Hydrodynamics
  • Laser Resonators
  • Mechanics
  • Physics Laboratories
  • Test And Evaluation
  • Thermal Conductivity
  • Turbulent Flow
  • Turbulent Mixing
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Fluid Mechanics and Fluid Dynamics.

Technology Areas

  • Directed Energy
  • Hypersonics