The generator will generate a lot of heat when it runs to produce electricity. Cold air must pass between the stator and rotor, so there will be fan blades on one end of the generator. The high-speed fan blades will blow. to exhaust the cooling air. There should be a grid-like net (mostly circular and closed) on the outside, which is the windshield of the generator, which protects the fan blades to prevent objects from falling on the fan blades.
Not necessarily. Fan power is equal to the product of torque and angular velocity, so high torque does not necessarily have high power output.
The most typical example is the Dutch wind turbine and the now common three-blade wind turbine. If both are the same size, under certain wind speed conditions, the torque of the. The Dutch wind turbine is much larger, but its speed is very slow, so it cannot be used as an electricity generator.