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Wind Tunnel Measurement Optimization | Portfolium
Wind Tunnel Measurement Optimization
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December 29, 2016 in Engineering
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My senior design project is to take John Deere's wind tunnels and update how the air flow is measured. The current system is accurate, but could be better, and it is very expensive to repair. As of now the wind tunnels operate per ASHRAE standard nozzles. Upstream of the test section there is a bank of nozzles of varying size. Each size and combination of nozzles has a certain range of air flow that it can test accurately in, so from test to test different nozzles need to be incorporated which takes time and leads to inconsistencies. To alleviate this I am replacing the nozzle bank with an array of vane anemometers that will sit in about the same location the nozzles do now. It will utilize a 9 point array in order to get a good average of the air flow distributed through the entire cross sectional area of the tunnel while maintaining symmetry. I have done finite element calculations to prove the need for this project and I have done finite element calculations to prove that the nozzle system creates a significant amount of turbulence compared to the more symmetrical less restrictive anemometer system. As of today, 12-28-2016, my project is in the structural design phase. I am trying to find the least restrictive fixture to hold these anemometers in the tunnel. So I am doing static load analysis on the fixture to find how small diameter of a material I can use with a very low friction surface.
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Ethan Olson

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