TWO-DIMENSIONAL WIND-TUNNEL INVESTIGATION AT HIGHnREYNOLDS NUMBERS OF TWO SYMMETRICAL CIRCULAR-ARC AIRFOIL SECTIONS WITH HIGH-LIFT DEVICES

摘要

An investigation was made of two Symmetrical circular-arc airfoils of 6 and 10 percent thickness and equipped with leading-edge and trailing-edge high-lift devices. The high-lift devices consisted of a 0.20-chord plain trailing-edge flap, a 0.15-chord drooped-nose flap and a 0.10-chord loading-edge extensible flap. The section lift, pitching-moment, and some drag characteristics of the two supersonic airfoils tested at high Reynolds numbers and low Mach numbers (M≦0.14) with the various high-lift devices are presented.