The two-dimensional flow around a slotted flap

Abstract

This Report describes experimental measurements and theoretical analysis of the flow around a wing with a single slotted flap under two-dimensional flow conditions. The particular experimental techniques of testing and measurement are described. The results show that the measured flow is strongly dependent on the inviscid solution for the flow around the wing and the flap, and that near to the optimum flap position there is only weak interference between the wake from the wing and the boundary layer on the flap. The reasons for the occurrence of an optimum flap position are described, and some comments made on the influence of Reynolds number on this position.