DRAG MEASUREMENTS IN A STREAM WITH SINUSOIDALLY FLUCTUATING VELOCITY IN THE LONGITUDINAL DIRECTION

Abstract

The drag coefficients of cylinders and plates in a stream with sinusoidal fluctuations in velocity are investigated. A tube with counterrotating vanes at the rear is used to produce the flow fluctuations. This tube was placed in the open jet of a low speed tunnel. The models were mounted on a vertical sting, which supported the one-component force transducer. The drag coefficients, based on average values of drag and dynamic pressure, show no variation with frequency parameter changes. The fluctuating component of drag does show a dependence on the frequency parameter. Also, a phase shift is noticed between the velocity and the force.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1966
Accession Number
AD0646643

Entities

People

  • Clifton G. Wrestler Jr.

Tags

Communities of Interest

  • Biomedical
  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Abstracts
  • Army Aviation
  • Atmospheric Motion
  • Boundary Layer
  • Diameters
  • Dynamic Pressure
  • Electronic Equipment
  • Fluid Dynamics
  • Governments
  • Measurement
  • Military Research
  • Power Supplies
  • Standards
  • Steady State
  • Test And Evaluation
  • Two Dimensional
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Fluid Dynamics.
  • Plasma Physics / Magnetohydrodynamics