Publication:
An investigation of the aerodynamic response of a wind anemometer

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Authors
Laferty, John Denison
Hicks, William Franklin
Subjects
anemometer
drag sphere
unsteady flow
oscillating flow
drag
unsteady
Advisors
Schmidt, Louis V.
Date of Issue
1967-06
Date
June 1967
Publisher
Monterey, California. U.S. Naval Postgraduate School
Language
en_US
Abstract
An experimental investigation was made to determine the aerodynamic response of a wind anemometer to unsteady air loads. The anemometer, a perforated drag sphere mounted upon a cylindrical pedestal, sensed dynamic pressure by a strain gage balance system. The anemometer response was calibrated for static and dynamic mechanical inputs and for steady aerodynamic loads prior to the unsteady investigation. The unsteady environment was obtained in an oscillating flow wind tunnel which utilizes a rotating shutter valve to superimpose a harmonically varying velocity upon a mean free stream. For steady flow conditions the anemometer drag coefficient remained essentially constant, apparently independent of Reynolds number. The anemometer responded well to the unsteady air loads at frequencies up to 20 cycles per second and mean dynamic pressures to 8.85 pounds per square foot. Unsteady aerodynamic response was qualitatively substantiated by a quasi-steady approximation to the measured unsteady drag.
Type
Thesis
Description
Series/Report No
Department
Aeronautics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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