Derivation of a Wavenumber Filter Design for the Measurement of Turbulent Wall Pressure Fluctuations

Abstract

Measurement of the wave number-frequency spectrum o(kl,w) of turbulent wall pressure fluctuations requires a line array (wave number filter) of closely spaced sensors. However, the wide range of wave numbers of the wall pressure fluctuations that contribute to the spectrum imposes constraints on sensor size, spacing, and number. In this study, the Corcos model of the wall pressure field is used in conjunction with recent experimental measurements to determine design parameters expressed in terms of boundary layer length and time scales. For the case of turbulent boundary layers at moderate to high Reynolds numbers, the resulting wave number design requires micro fabrication technology. Boundary layer, Filter design, Line array, Micro fabrication, Pressure sensor turbulent wall pressure, Wall pressure field, Wave number-frequency spectrum.

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Document Details

Document Type
Technical Report
Publication Date
Nov 14, 1994
Accession Number
ADA286421

Entities

People

  • Bruce M. Abraham
  • William L. Keith

Organizations

  • Naval Undersea Warfare Center

Tags

Communities of Interest

  • Materials and Manufacturing Processes
  • Sensors

DTIC Thesaurus Topics

  • Boundary Layer
  • Engineering
  • Flow
  • Fluid Mechanics
  • Frequency
  • Jet Propulsion
  • Layers
  • Measurement
  • Mechanical Engineering
  • Mechanics
  • Reynolds Number
  • Shear Stresses
  • Signal Processing
  • Turbulent Boundary Layer
  • Two Dimensional
  • Warfare
  • Water Tunnels

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Image Processing and Computer Vision.
  • Structural Dynamics.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster