|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||416/23 ; 416/88 ; 416/135 ; 416/44|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 9 인용 특허 : 0|
A wind turbine generator blade includes a movable front portion, extending from the faster-moving blade tip in a span-wise direction along the blade, and mounted on a pivot axis permitting the front portion to be displaced to a “high drag”position in which it has a high negative angle of incidence which will in turn give rise to a high negative angle of attack to the relative airflow and hence an increased drag tending to slow down an overspeeding blade, but will also give rise to an increased lift which assists in slowing down the overspeeding blade. It...
A turbine rotor comprising a plurality of blades each having: (a) first and second parallel blade portions which have a first configuration in which the first and second parallel blade portions have a first relative positioning in which they co-operate in forming an aerofoil section for airflow-driven movement and a second configuration in which they have a second relative positioning in which they define an increased-drag configuration for power control purposes; (b) means mounting said second blade portion aft of the first blade portion; and (c) pivot ...