edge vortex

An airflow that lies midway between a steady streamline flow and an unsteady flow. The flow separates at sharp leading edges as a result of the boundary-layer effect but does not break down into a turbulent airflow. Instead strong vortices are formed, which generate lift. This kind of flow is prevalent in delta and swept-wing-plan forms particularly at high angles of attack. Also known as a controlled separated flow.

Aviation dictionary. 2014.

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