One of the present designs being investigated for increasing the lifting capabilities of aircraft is termed upper surface blowing. The exhaust gases of the jet engine are directed along the upper surface of the wing and, when attached, are turned by the wing's upper surface and trailing edge flaps. It has been found that a significant increase in lift is realized, but the loading that the structure must endure is greatly increased. Hence, there exists a need for more information about the flowfield for this three-dimensional wall jet. Several previous reports have dealt with the experimental investigation of the near-field region of a three-dimensional wall jet. The present paper emphasizes two areas. First, the effects on the flowfields of varying the ratio of the velocity at the exit plane of the nozzle to the outer tunnel flow are reported. Second, pressure-velocity correlations are taken and some trands are discussed. Emphasis is placed on comparing the coherence between the fluctuating pressure and velocity fields at various locations in the different flow configurations. (Jensen)
Pressure and velocity measurements in a three-dimensional wall jet
Druck- und Geschwindigkeitsmessungen in einer dreidimensionalen Duesenstroemung an einer Wand
AIAA Journal ; 17 , 4 ; 332-333
1979
2 Seiten, 4 Bilder, 8 Quellen
Article (Journal)
English