PERFORMANCE IMPROVEMENT ON TAILPLANES BY TURBULATORS

Abstract

Airfoils on tailplanes operating at lower Reynolds numbers than the wing may produce large larninar separation bubbles with excessive additional drag when the flap is deflected. In order to demonstrate the effectiveness of turbulators, tests were made in the Laminar wind tunnel of the University of Stuttgart on a model of the FX 71-L-150/30 airfoil with a chord of 0.5 m at Reynolds numbers of 0.7 and 1.5 million.