Accession Number : AD0264883

Title :   EFFECT OF GROUNDBOARD HEIGHT ON THE AERODYNAMIC CHARACTERISTICS OF A LIFTING CIRCULAR CYLINDER USING TANGENTIAL BLOWING FROM SURFACE SLOTS FOR LIFT GENERATION

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON D C

Personal Author(s) : LOCKWOOD,VERNARD E.

Report Date : OCT 1961

Pagination or Media Count : 1

Abstract : Lift and drag measurements were obtained on a semispan circular cylinder having a lengthdiameter ratio of 4 (aspect ratio 8) and an end plate of 2.5 diameters. The investigation was made to determine to what extent the characteristics are affected by groundboard height. Tests were made over a momentum coefficient range from 0.14 to 4.6 and groundboard height ranging from 1.5 to 10 diameters from the cylin er axis. The test Reynolds number was approximately 290,000. (Author)

Descriptors :   *AIRCRAFT, *BOUNDARY LAYER CONTROL, *GROUND EFFECT, AERODYNAMIC CHARACTERISTICS, CYLINDRICAL BODIES, DRAG, LIFT, STABILITY, WIND TUNNELS

Distribution Statement : APPROVED FOR PUBLIC RELEASE