| 摘要 |
A device reduces a drag, and thereby a pressure loss, produced by a relative displacement between a body and a fluid or a fluid displacement in the body. The inventive device comprises means (2) which is arranged in or on the body surface contacting with the fluid along said surface for controlling the direction of rotation of the fluid swirls, thereby reducing friction forces between said body and fluid, the drag, the stresses to which the body is exposed or the fluid pressure loss. |
