An investigation of the aerodynamic response of a wind anemometer
Laferty, John Denison
Hicks, William Franklin
Schmidt, Louis V.
MetadataShow full item record
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.
RightsThis 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.
Showing items related by title, author, creator and subject.
An Experimental and Computational Investigation of Oscillating Airfoil Unsteady Aerodynamics at Large Mean Incidence Capece, Vincent R.; Platzer, Max F. (2003-03);A major challenge in the design and development of turbomachine airfoils for gas turbine engines is high cycle fatigue failures due to flutter and aerodynamically induced forced vibrations. In order to predict the aeroelastic ...
Computational and experimental investigation of the aerodynamic characteristics of a windsurfing sail section Avila, Matthew R. (Monterey, California. Naval Postgraduate School, 1992-12);In this thesis results of a computational and experimental investigation of the aerodynamic characteristics of a sail section used in windsurfing sails are presented. State-of-the-art computational methods (panel, direct ...
Transonic flutter computations for the NLR 7301 supercritical airfoil Weber, Stefan; Jones, Kevin D.; Ekaterinaris, John A.; Platzer, Max F. (Éditions scientifiques et médicales Elsevier SAS., 2001);A numerical investigation of the transonic steady-state aerodynamics and of the two-degree-of-freedom bending/torsion flutter characteristics of the NLR 7301 section is carried out using a time-domain method. An unsteady, ...