Why does the windmill turn?

Introduction Why does the windmill turn? The fixed shape of the windmill's blades (one side is higher and the other is lower than the direction of the wind) allows the wind to blow in one direction (from high to low) on the surface of the blades, thus

Why does the windmill turn?

The fixed shape of the windmill's blades (one side is higher and the other is lower than the direction of the wind) allows the wind to blow in one direction (from high to low) on the surface of the blades, thus changing the passing wind. wind direction.

If the wind is given a turning force, then the wind also gives the fan blades a force in the opposite direction. The wind also exerts a reaction force on the fan blades that fix the switch. The wind blades are fixed on the windmill shaft, so the force exerted by the wind on the wind blades is converted into the shear stress of the windmill through the fixed blades, so the windmill rotates.

So the greater the wind, the greater the steering force the wind blades give to the wind. Correspondingly, the greater the steering force the wind gives to the windmill, the faster the windmill turns.

A windmill, also called a wind turbine, is a power machine that does not require fuel and uses wind as energy.

The first windmills appeared in Western Europe

The first windmills appeared in Western Europe at the end of the 12th century. Some believe that soldiers who participated in the Crusades in Palestine brought information about windmills back home. However, the design of Western windmills is so different from that of Syrian windmills that they may have been invented independently. Typical Mediterranean windmills have round stone towers and vertical wings mounted toward the prevailing winds. They are still used for grinding grains.

The difference between Western windmills is that the blades rotate around a vertical plane. Because the wind is more variable in Europe than in West Asia, the windmill also has a mechanical device to rotate the wings in the direction of the wind. Modern windmills are connected to power generators on the island of Hello in St. Reese, Denmark.

Reference for the above content? Baidu Encyclopedia - Windmill

The rotating ones that generate electricity on the grassland are called windmills.

First of all, we must make one point clear. What is turned by the wind is not the generator, but the windmill, or wind turbine. Then drive the generator.

How to turn a windmill is actually not a very complicated thing. Windmills have blades, blades that look like airplane wings. Because the blade has a certain angle of attack. After the wind flows over the blade, the flow speed will be different due to the different lengths of the two ends of the blade. There is a theorem in physics. The wider the speed of the fluid, the lower the pressure will be. Therefore, due to the different gas flow speeds on both sides, a gap is formed on one side. When the pressure is high and the pressure is low on one side, the windmill is spinning.

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