How do wing fences benefit a swept wing design?

Wing fences are used in swept wing designs primarily to manage airflow over the wing and to maintain control at higher angles of attack. By protruding from the wing surface, wing fences act as barriers that help to channel airflow more effectively along the wing surface, thereby preventing the flow from fluctuating or diverting laterally towards the wing tips. This is particularly important for maintaining lift and delaying flow separation, which can lead to stalling.

In a swept wing configuration, there is a tendency for airflow to separate at higher angles of attack, particularly near the tips, which can lead to a loss of effective lift and control. Wing fences help to mitigate these issues by maintaining attached flow over a greater portion of the wing and enhancing overall aerodynamic efficiency, ensuring that the aircraft remains controllable and stable.

While wing fences might change aerodynamic characteristics, they primarily aim to improve performance and control rather than influencing aspects like aesthetics or structural weight. This highlights the significant role they play in enhancing the effectiveness of swept wing designs, particularly during critical flight maneuvers.