Wind blades CEE By janet gadea diaz

Criteria:

Create wind blades that generate the most energy.

CLAIM:

The variable that most increased the power of the wind turbine the most was angle, the other two variables size and number of the wind blades although they seemed nessisary at the time, they ended up bringing the power down.

Evidence:

The first variable angle produced 0.021 watts of energy. The second variable number of blades as mentioned in the claim brought the power down to 0.011 watts. The last variable also brought it down to 0.006 watts.

Explanation:

Newton’s third law says that for every action, there is an equal and opposite reaction. For the wind turbine blade, the air against the blade causes the blade to be pushed. If the blade has no angle the blade will push backwards but since wind turbine blades are set at an angle the wind is pushed at an angle, pushing the blades away. Bernoulli’s principle says that faster moving air has lower pressure. Wind turbine blades are shaped so that the air moving around the blade travels faster on the downwind side of the blade than the moving across the upwind side of the blade. The downwind side of the blade has a curve, while the upwind side is fat. Since the air is moving faster on the curved side of the blade, there is less pressure on the flat side of the blade. The difference in pressure on the opposite sides of the blade cause the blade to lift.

Sources: WindWise Education lesson 11

Credits:

Created with images by CGP Grey - "Windmills"

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