The Measurement of Flow-Induced Surface Displacement on a Compliant Surface by Optical Holographic Interferometry

Abstract

Flow-induced surface displacements that form on a single-layer passive isotropic viscoelastic compliant surface as a result of the interaction with a turbulent boundary layer are measured by non-intrusive optical holographic interferometry in connection with an interactive fringe-processing system. Specific topographic features of a large section of the compliant surface are obtained in the form of interferometric fringe patterns. Information about the dimensions of the 'foot prints' or the surface displacements of the turbulence on the compliant surface are presented in the form of line contours and isometric phase maps. These experimental data are essential in order to determine statistical measures of the random topography of the compliant surface. Furthermore, by coupling with the simultaneous measurements of the turbulence field, the physics of the alteration of the turbulent boundary layer by the undulating surface can then be better understood.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1991
Accession Number
ADA275410

Entities

People

  • Matt Fisher
  • Tim Lee
  • W. H. Schwarz

Organizations

  • Johns Hopkins University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Boundary Layer Flow
  • Diffraction
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Frequency
  • Graphics
  • Lasers
  • Measurement
  • Mechanics
  • Optics
  • Reynolds Number
  • Spearography
  • Turbulent Boundary Layer
  • Turbulent Flow
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Computer Science.
  • Fluid Mechanics and Fluid Dynamics.
  • Thin Film Deposition Science.