Why does wind power use three blades?

I don't know this question

But I think,

wind energy

Sanye

The angle between the three blade type is 120 degrees. The wind drives the three blades of the generator and begins to be parallel to a certain blade, causing it to rotate forward. Its training effect gradually becomes obvious after forming an angle. of 60° with this blade, the

direction of movement of the blade

and the direction of movement of the wind

become gradually coherent,

The effect of the wind

gradually weakens. At this time, the angle between the wind force and the next blade is 0 degrees (that is, the wind force and the next blade are on the same parallel line ), and the wind force will continue to decrease. A blade works.

If the three-blade type is replaced by a four-blade type, the angle between the blades is 90°. When the frit acts at a 90 degree angle to a given blade, it will form a 0 degree angle to the next blade. The wind always acts on the first blade, but it will also act on the second blade.

If the wind force at that moment

is different, for example, the wind stops for a while, then one blade will push forward while the The other blade will stop. . Not only is this not conducive to wind power generation, but it also consumes more equipment.

Two-leaf blades are unable to maintain the continuous force of the wind, and the one advance without the other. then blown forward by the wind, preventing the power generation device from rotating properly.

It can be concluded that with four blades, the interaction between the blades is relatively large, which affects the result of their joint action and reduces the efficiency. As for the two blades, they interfere with each otherand the effect between them is also obvious, which is also undesirable.

It can be said that in three-blade wind power generation, two blades play a diversion role (advantageous), and one blade plays a blocking role (disadvantage, the blade which is lifted towards the top). The shape of the wind turbine blades is not straight, but has a curvature, which also serves to capture the wind when it is advantageous, and to let the wind pass when it is disadvantageous.

In this process, using the college's physics knowledge,

Wind energy

is converted into the kinetic energy of the blades and the potential energy of the blades. blades. The energy and potential energy of the blades are converted into electrical energy, regardless of friction. A wind with a force of 2 Newtons (the force is 2 Newtons/square meter) blows through a three-page generator and acts on one of its blades. Find out how many joulesit generates after going from a 0 degree angle with the wind direction to a 60 degree angle with the wind direction...? (This should give a picture)

Reflection process, the wind force is given, multiplied by the

area

of the blade, it is strength. multiply by the sin problem or cos angle. The function here is to have an arm problem moment, so It's simpler to consider if the work is equal to F (force) times S (distance), the distance traveled by the blade will be different because the radius of the different points of the blade is different due to the force of the wind. The result is that the work done by the wind pushing the blades to move plus the work done by the potential of the blades in this process (the work done by gravity) is the work of producing electricity.

I don't know if this is correct...

Three-blade wind turbines and vertical axis wind turbines are two different typeserents of wind energy equipment. Their parameters are compared. follows:

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1. Efficiency: Wind turbines with three blades generally have a higher efficiency and can start spinning and producing power at lower wind speeds. Vertical axis wind turbines require higher start-up speeds to begin operation.

2. Noise: Due to their different design structures, vertical axis wind turbines are generally quieter than three-blade wind turbines.

3. Maintenance cost: Relatively speaking, the vertical axis type is more convenient to maintain than the three-blade type due to its simple structure and fewer parts.

4. Stability: In high airflow environments, three-blade designs tend to be more stable and reliable. The vertical axis type may suffer from vibration or imbalance issues.

In general, you shouldmake compromises based on the actual situation when choosing the one that suits your usage scenarios and needs.