Investigation of Improvement Design on Aileron Surface Flow State of High Lift Configuration in BWB

The aileron is one of the most important tools for adjusting roll attitude aircraft, but surface flow state likely to be affected by high-lift devices. In this paper, using computational fluid dynamics (CFD) simulations and wind tunnel tests, Krueger flap effects on ailerons in a typical blended wing body civil aircraft were investigated. order increase lift, deflecting makes separation occur BWB aircraft. This way stall that zone first appears at tip rather than root unreasonable For above problem, sensitivity analysis design parameters flaps was carried out. results indicate angle outboard mainly affects ailerons. Its length pitch moment tremendously, while its width slot slightly. Finally, principles improvement proposed, redesign high lift configuration significantly improved minimal cost aerodynamic characteristics without losing existing great performance.