| 摘要 |
Methods, systems, and apparatuses for efficient low-cost wind energy improvements using passive circulation control including, for instance, a fixed-pitch blade having a hub mountable end, a tip end, a blade body between the hub mountable end and the tip end of the fixed-pitch blade, and a channel interior to the blade body having an one or more ingress ports and one or more egress ports, according to one embodiment. For example, the one or more egress ports may be configured as a slit or a series of slits near the trailing edge so as to vent air out of the slit or slits at an angle to the local air flow traversing the blades airfoil. The one or more egress ports may be positioned longitudinally upon a top side or a bottom side of a trailing edge of the blade body such that the one or more egress ports vent air out the top or bottom side of the trailing edge of the blade body to reduce lift or increase lift respectively, for the fixed-pitch blade when under rotation upon a rotating hub via passive circulation control.
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