Aerodynamic Aspects of the Longitudinal Motion of a High-Lift Aircraft Configuration with Circulation Control

Kurzfassung

The aim of sub-project C1 of the Collaborative Research Center/Sonderforschungsbereich 880 (SFB 880) is to investigate numerically the flight mechanical characteristics of an aircraft with circulation controlled high-lift devices from an aerodynamic point of view. This paper summarizes the most important aspects of the work done so far. It begins with a basic analysis of the impact of varying blowing coefficients on the aircraft performance based on the wing-body configuration. Furthermore, an overview of the influence of the circulation controlled wing on the aerodynamics of the horizontal tail plane is presented. Eventually, the resulting longitudinal static stability and controllability behavior of the SFB 880’s reference aircraft is discussed. Additionally, the interaction of a circulation controlled wing and the slipstream of a wing mounted turboprop engine is investigated. Besides the studies of the static behavior, first results of the dynamic behavior, specifically the temporal behavior of circulation control after being activated are presented.