4'' Impeller by birdmun

Hobby DIY

Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!

4'' Impeller

birdmun

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Published on January 3, 2012

Description

I designed this to help me prove or disprove a thought I have about wind power generation. It is designed to be 101.6mm in diameter and 5.28mm thick. I just want to say the OpenSCAD file is not commented or formatted well (This is my first attempt at building anything with OpenSCAD.)

Instructions

I am having issues with the airfoil shape being a bit too aggressive for my reprap's abilities.

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nasferatu on March 1, 2013 said:

Just printed this and it looks great. Thanks for the upload, keep up the good work.

birdmun on March 1, 2013 said:

Thanks for the compliment. After having seen what acetone vapors do to ABS, I am wondering if the part can't be made smoother with the same process.

qharley on January 4, 2012 said:

Another problem you will face with the design as is, is that the impeller has lots of drag. Wind through the center of the tube (fastest movement) will try to speed up the impeller at a rate fitting the angle of the profile, while slower moving air close to the edges of the tube will slow the impeller because of two reasons:

1) the blades move faster at the periphery
2) the air move slower at the periphery

You will have to extrude your blades in a twisted way, like ship and turboprop propellers.

birdmun on January 4, 2012 said:

Would a nose cone help in your opinion?

Sanjay on January 4, 2012 said:

What are you trying to prove/disprove?

birdmun on January 4, 2012 said:

I want to put it in a tube with an airfoil above the tube to increase airspeed at lower wind speeds to prove or disprove that I can get usable energy.