03.4 - Applied Aerodynamics
FLIGHT TEST AND CFD STUDY OF THE EFFECT OF WING BOUNDARY LAYER TRANSITION ON AILERON BALANCE
L. Manfriani¹, X. Liu¹; ¹ZHAW, Switzerland
A particular training aircraft exhibited an unusual lateral trim change, with a marked tendency to roll left when entering a cloud or passing through an inversion layer. It was found that this behavior was caused by small paint steps causing an asymmetric transition on the wings and affecting aileron balance. A high fidelity CFD was conducted to provide further insight in this peculiar phenomenon.