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PPT : Nascar Aerodynamics By: Mark Angeloni, Brendon Keinath, Todd Sifleet

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Why Does it Matter?
* At high speed aerodynamic effects play an enormous role in car performance.
* By taking advantage of the effects of lift racecars have been able increase their corning ability, which in turn decreases lap time.
* Also by minimizing drag they can maximize the top speed of the car.

Model Testing in a Wind Tunnel
* We used a 1/12 scale model of a NASCAR, because full-scale prototype testing is more expensive and time consuming
* By running the model in wind tunnel at different velocities we are able to model different actual car velocities, gathering relevant information concerning aerodynamics.

Model Testing
* Problems With Model Testing
o Not possible to match Reynolds Number
o Wind Tunnel cannot reach necessary speeds
o If it could, Mach number would be too large and we’d have to worry about compressibility
* Some ways to fix this problem are:
o A larger wind tunnel with larger models
o A different testing fluid with a higher density
o Pressurizing and/or adjusting the air temp in the wind tunnel
o Or in our case running the wind tunnel at several velocities and extrapolating to determine useful information.

Model Testing in a Wind Tunnel

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PPT : Nascar Aerodynamics By: Mark Angeloni, Brendon Keinath, Todd Sifleet Category : Nascar
Source : www.vu.union.edu
File Size : 1 Mb
Language : English
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