VISCOUS EFFECTS ON BALANCED JETS IN GROUND PROXIMITY

Abstract

A theoretical investigation to determine the viscous effects on balanced jets in ground proximity was carried out. Pertinent available literature concerning inviscid jet impingement, vortex generation and viscous mixing is, briefly, reviewed. The mean flow pattern of an annular jet is ground proximity is seen to be that of diffusing jets which are deflected laterally by their interaction with the central pressure zone. With simple and plausible approximations, the effects of a standing vortex and jet mixing can be theoretically determined, resulting in good agreement between predicted and measured augmentation factors. It is found that in ground proximity the effect of jet mixing is always adverse and dominant. Curves which allow the rapid estimation of augmentation factors are presented.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1963
Accession Number
AD0426132

Entities

People

  • C. C. Hsu

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Weapons Technologies

DTIC Thesaurus Topics

  • Base Pressure
  • Boundary Layer
  • Cartesian Coordinates
  • Diffusion
  • Flow Fields
  • Fluid Flow
  • Geometry
  • Ground Effect
  • Ground Effect Machines
  • Jet Flow
  • Mass Flow
  • Pressure Distribution
  • Reynolds Number
  • Ship Model Basins
  • Transportation
  • Turbulent Mixing
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Fluid Dynamics.