The Effect of High Temperature on Wall Shear in a Two Dimensional Wall Jet

Abstract

The effect of turbulence on skin friction was examined In the developing stage of a high Reynolds number wall let. Skin friction was computed from the law of the wall measurements of mean velocity profiles In the sublayer. It was observed that constant 'A' In the law of the wall relation U/U* = A log YU*/upsilon + B was a universal one equal to 5.6 while 'B' was linearly dependent on the turbulence Intensity near the wall. The wall shear was not significantly altered from that of an ordinary flat plate turbulent boundary layer even at high turbulence levels. The decay of the mean velocity In the longitudinal direction was found to be independent of the momentum flux of the jet at the nozzle exit.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1992
Accession Number
ADA262982

Entities

People

  • M. A. Narayanan
  • Richard B. Rivir

Organizations

  • Wright Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Boundaries
  • Boundary Layer
  • Fluid Dynamics
  • Fluid Mechanics
  • Gas Turbines
  • Heat Transfer
  • Layers
  • Measurement
  • Mechanics
  • Reynolds Number
  • Skin Friction
  • Turbine Components
  • Turbines
  • Turbulence
  • Turbulent Boundary Layer
  • Turbulent Mixing
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.