Why are wind turbine blades designed to be wider?

"Blade width, number of blades and speed are inversely proportional." It is undeniable that compared to narrow blades, wide blades produce greater resistance when rotating. However, at the same time, the wind pressure on the windward surface of wide blades is also higher than that of narrow blades. The reason the wind wheel rotates is that the positive wind pressure on the blades is greater than the resistance on the blades as the wind wheel rotates. Pressure and resistance follow physics. Pressure equals pressure times pressure. surface, that is to say F=P*S (F, the pressure on the blade; P, the pressure on the blade per unit area; S, the effective surface of the blade under pressure). Since the wind pressure remains unchanged under the same conditions, the force exerted on the blade is related to the effective pressure area of ​​the blade. Therefore, wecan see that under the same conditions, a wind rotor with wide blades is easier to receive and absorb wind energy than a wind rotor with narrow blades. The wind rotor gets more energy and the wind rotor spins more smoothly and has. a higher speed. In the same way, a wind turbine under the same conditions will obtain different wind energy with a different number of blades, more wind energy will be obtained, the wind turbine will be easier to start, and the speed of the wind turbine will be greater. will be higher.