As the Wind Turns: Science Experiment

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By WXedge Staff on March 15, 2013, 11:30am Last modified: March 15, 2013, 2:02pm

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Amrit Parmanand from Hartford Magnet Trinity College Academy presented his experiment, "As the Wind Turns" at the Connecticut Science and Engineering Fair this week.

In the experiment, his problem to solve was, "How does the incline of the blades on a wind turbine affect the efficiency of the wind turbine?

Amrit gives an overview of his experiment and the results in the video above. 

Abstract:
The title of my experiment is “As The Wind Turns.” In the experiment, my
problem was “How does the incline of the blades on a wind turbine affect the
efficiency of the wind turbine?” Wind turbine designers would be interested in
my results, because they could optimize turbine blades based on the results.
To test the problem, I twisted metal blades on a turbine to different angles and
put them in front of a fan. Using a measuring wheel, I checked how many
times it rotated over 30 seconds in order to check its efficiency. After
conducting the experiment, I could conclude that 30° is the optimal angle for a
wind turbine to have its blades at. The 5 inch blades at 30° rotated 213 times
on average, while 45° rotated 171 times, and 60° rotated only 139 times. With
7 inch blades, the 30° blades rotated 122 times, the 45° blades rotated 48
times, and the 60° blades rotated the least, at 41 times. The pattern continued
with the 10 inch blade, where 30° rotated 98 times, 45° rotated 38 times and
then the minimum was 60°, with 15 rotations. The 30° blades rotated the most
because at that angle they provided the right balance between blade surface
area exposure and wind resistance, compared to the other two angles.

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WXedge Staff

Town: New Haven, CT  

Reporting for WXedge since February 2012.

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