Asymmetric nose-fairing for wing-body interference flow

摘要

In the context of the wing-fuselage junction flow the purpose of a nose-fairing is to prevent the oncoming boundary-layer flow separation, which in turn eliminates the horseshoe vortex formation at the junction. A simple procedure is proposed here to arrive at an asymmetric fairing shape for a non-zero wing incidence angle. Even though it is a simple method to decide on fairing shape and size, the fairing designed by this method for a wing at 4 degrees incidence is shown to satisfy the purpose of the nose-fairing. The wind tunnel experimental results clearly show that the designed fairing improves the flow quality at the wing-body intersection by preventing flow separation and vortex formation. Relatively lower momentum deficit in the boundary-layer (behind the wing trailing edge) hints at drag-reduction for the faired configuration.