Based on the type of rotor, the turbine used for vertical axis wind turbine is:

🌪️ Key Points
[Sub-heading 2]:
→ Vertical axis wind turbines (VAWT): These have the main rotor shaft arranged vertically.
→ The main advantage of this arrangement is that the wind turbine does not need to be pointed into the wind.
→ This is an advantage on sites where the wind direction is highly variable or has turbulent winds.
→ With a vertical axis, the generator and other primary components can be placed near the ground, so the tower does not need to support it, also making maintenance easier.
→ The main drawback of a VAWT is it generally creates drag when rotating into the wind.

🌀 These are classified as
→ Darrieus turbine
→ Giromill turbine
→ Savonius turbine

🌀 Savonius wind turbines are a type of vertical-axis wind turbines. These are used for converting the force of the wind into torque on a rotating shaft. The turbine consists of a number of aerofoils, usually, but not always—vertically mounted on a rotating shaft or framework, either ground stationed or tethered in airborne systems.
→ The Savonius is a drag-type VAWT which operates in the same way as a cup anemometer.

🌬️ Horizontal axis wind turbines (HAWT):
→ A HAWT has a similar design to a windmill, with blades that look like a propeller and spin on the horizontal axis.
→ Horizontal axis wind turbines have the main rotor shaft and electrical generator at the top of a tower, and they must be pointed into the wind.
→ Small turbines are pointed by a simple wind vane placed square with the rotor (blades), while large turbines generally use a wind sensor coupled with a servo motor to turn the turbine into the wind.
→ Wind turbine blades are made stiff to prevent the blades from being pushed into the tower by high winds.

🌀 These are classified as
→ Multi-Blade
→ Sail
→ Propeller