Actuator assembly

A flow-control device with an actuator assembly for manipulating a fluid flowing around a flow body, part of the fluid being receivable in a volume of at least one cavity arranged in the flow body, and

• the fluid passing through at least one opening in the at least one cavity during manipulation of the fluid,
• the volume of the at least one cavity being changeable by moving a wall portion defining the cavity at least in part, comprising:
• a drive unit with at least one actuator;
• the actuator being coupled to a coupling element connected to the wall portion;
• the at least one actuator executing a periodic movement over time when actuated;
• the periodic movement causing a translational movement of the wall portion defining the cavity and the wall portion being shaped in terms of a topology thereof such that it adapts to a shape of the at least one cavity with the at least one opening thereof;
• and
• with at least one control device for actively and controllably influencing flow behavior.

A method for flow control on a flow body, in particular a flow body associated with an airborne apparatus or an aircraft or spacecraft, with

• an actuator assembly for manipulating a fluid flowing around the flow body,
• the fluid being received in a volume of at least one cavity arranged in the flow body, and
• the fluid passing through an opening in the at least one cavity during manipulation of the fluid,
• the volume of the at least one cavity being changeable by moving a wall portion defining the cavity at least in part,
• at least one actuator of a drive unit being coupled to a coupling element connected to the wall portion,
• the at least one actuator executing a periodic movement over time when actuated,
• the movement causing a translational movement of the wall portion defining the cavity and the wall portion being shaped in terms of a topology thereof such that it is adapted to a shape of the at least one cavity with the at least one opening thereof.