Pressure Perturbations in a Thin Boundary Layer over a Deforming Surface,

Abstract

For a thin turbulent boundary layer in incompressible flow over an oscillating surface the surface pressure will be dominated by the effect of the mean velocity distribution, the reason being that the perturbation viscous stresses and turbulent Reynolds stresses are important only within a very thin region near the surface. This permits the treatment of the boundary layer as an inviscid shear layer. An analytical expression for the oscillating surface pressure perturbation valid for oscillating deformations of a large scale compared to the shear layer thickness, is obtained by Fourier transformation in the streamwise variable. The extension to three-dimensional flow yields the result that the surface pressure operator has the same form as in the two-dimensional case.

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1974
Accession Number
ADA004519

Entities

People

  • James I. Lerner
  • Marten Landahl

Organizations

  • Massachusetts Institute of Technology

Tags

DTIC Thesaurus Topics

  • Aeronautics
  • Astronautics
  • Boundaries
  • Boundary Layer
  • Flow
  • Fourier Transformation
  • Incompressible Flow
  • Layers
  • Perturbations
  • Stresses
  • Three Dimensional
  • Three Dimensional Flow
  • Turbulent Boundary Layer
  • Turbulent Mixing
  • Two Dimensional

Fields of Study

  • Physics

Readers

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