|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||244/206 ; 244/130 ; 244/204 ; 244/201|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 37 인용 특허 : 17|
An apparatus, and its accompanying method, for reducing the drag of flows over a surface includes arrays of small disks and sensors. The arrays are embedded in the surface and may extend above, or be depressed below, the surface, provided they remain hydraulically smooth either when operating or when inactive. The disks are arranged in arrays of various shapes, and spaced according to the cruising speed of the vehicle on which the arrays are installed. For drag reduction at speeds of the order of 30 meters/second, preferred embodiments include disks that...
[ I claim:] [1.] An apparatus for actively controlling a boundary layer over a surface comprising at least one actuator at scales less than a local boundary layer thickness positioned in a surface, the at least one actuator having a stationary part and a rotating part, wherein the rotating part rotates in the plane of the surface, wherein the rotating part has an axis of rotation that is substantially perpendicular to the surface, and wherein the at least one actuator is either embedded in the surface, or may extend above or be depressed below the surfac...