Turbulent Boundary Layer Beneath Blankets: Measurements and Interpretations

Abstract

An analytical estimate of the performance of a blanket as a spatial- temporal filter for turbulent boundary layer pressure fluctuations is presented. The formulation is developed as an aid for the design of experiments and experimental procedures for measuring the performance of blankets. The interpretation of data acquired in such experiments is treated in some detail. A simplified analytical model is utilized which has the gross features of the pressure field beneath a convecting turbulent boundary layer. This serves to illustrate the trends that can be anticipated in data and to illustrate the effects of undesirable stray pressure fields. Some limited data were acquired in a quiet turbulent pipe facility and are treated with the developed formalism. Significant features in the data are briefly discussed.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1983
Accession Number
ADA247843

Entities

People

  • David W Taylor
  • F. E. Geib
  • G. Maidnik

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Ball Valves
  • Boundaries
  • Boundary Layer
  • Computations
  • Convection
  • Data Acquisition
  • Equations
  • Flow
  • Frequency
  • Instrumentation
  • Layers
  • Materials
  • Mathematics
  • Measurement
  • Pressure Transducers
  • Turbulent Boundary Layer
  • Water Tunnels

Fields of Study

  • Physics

Readers

  • Computer Vision.
  • Fluid Dynamics.