|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||244/208; 244/207; 244/209; 244/204|
|§371/§102 date||20081106 (20081106)|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 6 인용 특허 : 9|
This invention relates to a method and system (10) for controlling the boundary layer of an airfoil (12) to reduce profile drag during flap deflection. The system (10) comprises first means for blowing air from a lower surface (14) of the airfoil (12) to trip airflow from laminar flow to turbulent flow during positive flap deflection; and second means for applying a suction force at the lower surface (14) of the airfoil (12) to preserve laminar flow during negative flap deflection.
1. An airfoil in the form of a wing, provided with a system for controlling the boundary layer of a laminar flow wing having a flap and a flap hinge line, to reduce profile drag during flap deflection, the system comprising: a first blower including a first plurality of holes along the length of the lower surface of the wing to blow air through the first plurality of holes only during positive flap deflection from a lower surface of the wing to trip flow from laminar to turbulent during such positive flap deflection;a suction device to apply a suction fo...