OPTIONS: VERTICAL AXIS TURBINES
This turbine belongs to the category of lift turbines.
The lift is the force that acts on a wing profile because of a pressure difference, given by the different speeds which takes the fluid when “lapping” the surfaces of the profile.
With the increase of the speed of rotation, the upwind blade acts as a brake and limits and stabilizes the speed of rotation.
Another important aspect to be monitored is related to the resistances that oppose the start of the movement.
It may happen, in fact, that these are greater than the forces of rotation impressed by the wind to the machine.
This is why some wind turbines of this type can be started only with strong winds or through auxiliary starting motors.
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