DRAG MEASUREIMENTS ON AIRFOILS

Authors

  • D. Althaus

Keywords:

Aerodynamics, Design

Abstract

The drag of airfoils is evaluated from the loss of total head in the wake. This is achieved either by an integrated rake positioned vertical to the trailing edge at some distance from the airfoil trailing edge, or the wake is traversed by a single Pitot-tube point by point and the readings are integrated subsequently. In both cases the drag is evaluated only for a particular plane in spanwise direction. If the drag was measured by a balance, the mean value over the whole wind tunnel model could be attained. But, because of the undefinable influences of the tunnel walls, this procedure cannot be used satisfactorily. In the laminar wind tunnel at the Institut for Aerodynamics, University of Stuttgart, drag is measured by an integrating rake.

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Issue

Vol. 7 No. 1 (1981)

Section

Articles

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