Laser-Doppler Anemometer Measurements of Turbulence in Drag Reducing Flows

Abstract

The drag reduction, mean flow, and turbulence properties of several concentrations of Separan AP30 and water in a fully developed turbulent pipe flow were studied using a two-conpoment laser-Doppler anemometer. This measurement technique was chosen because of its inherent advantages over the traditional measuring techniques that have been used in previous studies of drag reducing flows. A polymer injection technique was used. A slurry of methanol and polymer powder was injected directly into the flowing water, providing a fresh, unaged polymer solution.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1972
Accession Number
AD0757075

Entities

People

  • Gordon L. Guenterberg

Organizations

  • University of Michigan

Tags

DTIC Thesaurus Topics

  • Boundary Layer
  • Detectors
  • Fluid Dynamics
  • Fluid Flow
  • Frequency Shift
  • Hydrodynamics
  • Hypervelocity Flow
  • Laser Anemometers
  • Lasers
  • Measurement
  • Pipe Flow
  • Pitot Tubes
  • Polymers
  • Refractive Index
  • Scattering
  • Turbulent Flow
  • Turbulent Mixing

Fields of Study

  • Environmental science

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Polymer Science and Technology
  • Rocket Propulsion.

Technology Areas

  • Directed Energy