Accession Number:

ADA001115

Title:

Laser and Hot-Film Anemometer Measurements in a Separating Turbulent Boundary Layer.

Descriptive Note:

Final technical rept.,

Corporate Author:

SOUTHERN METHODIST UNIV DALLAS TEX THERMAL AND FLUID SCIENCES CENTER

Report Date:

1974-09-01

Pagination or Media Count:

119.0

Abstract:

Measurements of a separating two-dimensional incomprssible airfoil-type pressure distribution boundary layer are reported. Unique mean and fluctuation velocity measurements and the distribution of the fraction of time the flow moves downstream were obtained in the separated region using a directionally sensitive laser anemometer. Linearized hot-film anemometer measurements of mean velocities, turbulent shearing stress and intensities, eddy celerities, spectra, and dissipation were made. Wall shearing stress, bursting frequencies, wall celerity and spanwise structure were obtained using flush surface hot-film sensors. The turbulent-non-turbulent interfacial intermittency and the frequency of passage of turbulent bulges were determined using smoke as a turbulence marker and the laser anemometer system for illumination and signal detection.

Subject Categories:

  • Aerodynamics
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE