Aerodynamic design modification of the Kopter AW09 helicopter

Abstract

Wind tunnel testing and accompanying numerical analyses are the basic methods applied to improve and optimize the aerodynamic design of the Kopter AW09, a 2.8 ton-class single engine utility helicopter. In order to ensure good handling qualities and performance, modifications of the upper fuselage are tested and evaluated by means of force and moment measurements, particle image velocimetry, and CFD analysis. Based on particular examples, these methods are presented.