Experiments were performed in a rectangular tank, partically filled with water, and spanned by a flat-bottomed airfoil section, derived from an NACA 0015 thickness distribution. Upstream of the airfoil was placed a two-dimensional air jet, also spanning the tank. One side of the tank was transparent, to permit flow visualization. Two-dimensional turbulent jet theory was used to establish the relationship between the jet exit dynamic pressure and the pressure recovery under the wing, which was supported by experimental evidence. It was found that the recovery of pressure was not highly sensitive to jet geometry; however, the formulation of spray was. For minimum spray formation, a jet impingement angle of about 25 deg was established. Several interesting wind-wave flow instabilities were observed. A thrust-reversal phenomenon, predicted by inviscid theory, could not be duplicated in the present experiment. (Kursetz)
Experimental observations of the two-dimensional power-augmented ram wing operated statically over water
Experimentelle Beobachtung eines zweidimensionalen Staudruck-Tragfluegels bei statischem Betrieb ueber Wasser
AIAA-Papers ; 1-9
1978
9 Seiten, 10 Bilder, 4 Quellen
Conference paper
English
Statically unstable flying wing layout aircraft stability augmentation control method
European Patent Office | 2020
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