| 摘要 |
A device according to the present disclosure (60) for generating a directed fluid flow comprises a support structure (1); a rotary structure (5) disposed in relation to the support structure so as to be rotatable around a first axis of rotation (10); and at least one active element (61, 61') disposed on the rotary structure (5) so as to be rotatable around a second axis of rotation (9,9'), and which has an active surface (67). The at least one active element is rotatably connected to the rotary structure and the support structure such that, when the rotary structure rotates in relation to the support structure by one revolution around the first axis of rotation in a first direction of rotation, the at least one active element rotates in relation to the rotary structure by half of one revolution around the second axis of rotation in the opposite direction of rotation.
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