A Re-Evaluation of Zero Pressure Gradient Compressible Turbulent Boundary Layer Measurements

Abstract

A number of compressible turbulent boundary layer velocity and temperature profiles with zero pressure gradient were collected and prepared for computer analysis. An assumed equation for these profiles was chosen allowing four constants to be adjusted by a nonlinear least squares technique to fit the experimental data. The four constants are: velocity scale, boundary layer thickness, constant of the semi-log region, and wake constant. This equation is analogous to Cole's incompressible law of the wall and wake but uses a generalized velocity to account for compressibility. Measurements from 45 adiabatic wall tests were analyzed covering a Mach number range from 2 to 6 and a momentum thickness Reynolds number range from 2300 to 750,000. (Modified author abstract)

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1973
Accession Number
AD0762152

Entities

People

  • James E. Danberg

Organizations

  • Ballistic Research Laboratory

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Boundaries
  • Boundary Layer
  • Computers
  • Equations
  • Experimental Data
  • Friction
  • Heat Transfer
  • Layers
  • Least Squares Method
  • Mach Number
  • Maryland
  • Measurement
  • Pressure Gradients
  • Reynolds Number
  • Skin Friction
  • Thickness
  • Turbulent Boundary Layer

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.