Wind & Wet

Vertical axis wind turbine models

2 blade V rotor model

Two blade V rotor VAWT model

The blades of this rotor are made of card crudely formed into a symmetrical aerofoil section. They are angled out from the hub at approximately 45 degrees. The blades will be operating at a range of relative wind speeds depending on the position along the blade. The geometry suggests that the air flow across the angled blade will be at a lower angle of attack compared to a perpendicular blade. The rotor should also work when the air flow is not directly on the side of the rotor.
Radius
313mm
Number blades
2
Blade chord
104mm
Blade thickness
25mm
Blade thickness (%)
24%
Blade length
338mm
Frontal area
85100mm2
Density
0.82
Blade area / frontal area
This seems to start up and run more easily than the equivalent 2 blade H rotor and doesn't have the same vibration.
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