Ventilator & NACA

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1

Good evening

I'm in high school and I have to model a desk fan in order to improve performance by modifying the blades. Our mechanics teacher told us to use the NACA profiles but I must admit that I am a little lost. Indeed, I find tutorials for wind turbines, boat propellers, ... but not for a conventional fan. So I don't know if there is a profile "made for that" or if you have to do calculations to determine the profile that suits you, the right number of blades.

For your information, the fan is about 18 cm in diameter, 12V and we would have liked to increase the airflow sent by the fan while keeping the same power consumption.

If you have a method to find the NACA (or other) profile that meets our needs, we're all for it.

Yours truly,

adrien_roux

2

Hello

     For profiles, you will find them on sites such as: http://a190754.free.fr/PROFILES.PHP3 or better http://airfoiltools.com/airfoil/details?airfoil=oa206-il .

Then it's up to you to determine the Reynolds number of your flow and see the lift and drag coefficients and angles of attack that will interest  you (for this the last link is not bad) 

   In short, a lot of research to do and in English.......

Note: You can retrieve the coordinates of the profiles in text format, add a value of 0 for the z-coordinate and insert this as a curve in solidworks

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3

Hello

Thank you for these links which seem very useful to me... I leave my post open to post any questions and especially to put my final choice if it can help some.

Kind regards

adrien_roux

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