Accession Number:

AD0646643

Title:

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

Descriptive Note:

Corporate Author:

ARMY AVIATION MATERIEL LABS FORT EUSTIS VA

Personal Author(s):

Report Date:

1966-11-01

Pagination or Media Count:

37.0

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.

Subject Categories:

  • Atmospheric Physics
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE