ON-LINE COMPUTER ANALYSIS OF TURBULENCE DATA WITH THE FAST FOURIER TRANSFORM METHOD,

Abstract

Turbulence signals from linearized hot wire anemometers are sent directly to a digital computer with an analog-to-digital converter. The analog signals are converted to digital form and analyzed by means of the fast Fourier transform algorithm to obtain mean velocities, turbulence intensities, auto-spectra and auto-correlations. Sample auto-spectral and auto-correlation measurements in a two-dimensional turbulent mixing layer are shown; these results are obtained by analyzing 1,600,000 data points. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1969
Accession Number
AD0691059

Entities

People

  • G. R. Macgregor
  • S. D. Hansen
  • Yih-ho Pao

Organizations

  • Boeing

Tags

DTIC Thesaurus Topics

  • Analog Signals
  • Anemometers
  • Atmospheric Motion
  • Computers
  • Digital Computers
  • Fast Fourier Transforms
  • Hot Wire
  • Hot Wire Anemometers
  • Measurement
  • Turbulence
  • Turbulent Mixing
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Approximation Theory.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.