A Computational Model for Three-Dimensional Incompressible Wall Jets with Large Cross Flow

Abstract

The flow field of three dimensional incompressible wall jets prototypic of thrust augmenting ejectors with large cross flow is solved using a very efficient centered-Euler scheme in an orthogonal curvilinear coordinate system. The computational model treats initial conditions with arbitrary velocity profiles at or downstream of the jet exit. An averaging approach is employed for the first few marching steps to overcome spurious numerical oscillations associated with arbitrary initial profiles. Laminar as well as turbulent wall jets are simulated. Turbulence is introduced using a two layer mixing length model appropriate to curved three-dimensional wall jets. Typical results quantifying jet spreading, jet growth, nominal separation and jet shrink effects due to cross flow are presented.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1978
Accession Number
ADA071689

Entities

People

  • N. Malmuth
  • V Shankar
  • W. D. Murphy

Tags

Communities of Interest

  • Air Platforms
  • C4I
  • Weapons Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Boundary Layer Control
  • Computational Fluid Dynamics
  • Computational Science
  • Computers
  • Coordinate Systems
  • Difference Equations
  • Differential Equations
  • Equations
  • Flow Fields
  • Fluid Dynamics
  • Mechanics
  • Numerical Analysis
  • Pressure Gradients
  • Real Variables
  • Three Dimensional
  • Two Dimensional

Fields of Study

  • Physics

Readers

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