WIND-TUNNEL INVESTIGATION OF AERODYNAMIC LOADS ON A LARGE-SCALE EXTERNALLY BLOWN FLAP MODEL AND COMPARISON WITH THEORY

摘要

This report presents results from a wind-tunnel investigation of a large-scale externally blown flap model. The model was equipped with four turbofan engines, a triple-slotted flap sys¬tem, and a T-tail. The wing had a quarter-chord sweep of 25°, an aspect ratio of 7.28, and a taper ratio of 0.4. Aerodynamic loads and load distributions were determined from a total of 564 static pressure orifices located on the upper and lower surfaces of the slat, wing, and flaps. Loads are presented for variations of angle of attack, engine thrust setting, and flap deflection angle. In addition, the experimental results are compared with analytical results calculated by using a potential flow analysis.