Vertical Turbine - Derived
Derived from
Description
Includes a drop-in replacement, in which the wing profile is swept to make a smoother surface.
The other part is much larger and based on a NACA 2818 profile, which should apparently improve power. The arms are a much narrower oval shape to reduce drag.
Instructions
The pegs visible in the photo were meant to allow interlocking between layers. This would require two sets of parts, as there is a 30° "shift" after every 3 parts. The holes for the dowels should serve the purpose sufficiently.
I may design the top and bottom parts that would be required for a proper turbine, but I want to investigate the profile in OpenFoam first. That may take a while, or never happen. If someone needs these parts, just say so and I will just make them with the current design.
EDIT: Top and bottom parts added. The .zip includes 5 extra pieces that need to be printed to have the top and bottom blades in a plane. I would suggest making a round plate for the top and the bottom.
You must be logged in to post a comment.
I'm just on my 2nd piece now. it has about 1mm to spare on the edge when I orientate it diagonally on the platform. (140 x 140)
This is Great! I've been wanting to build one of these for quite a while!
In refrence to the Savonius & Gorlov types, I'm working on the theory / design to couple the two with a torque converter style apparatus, so that when the Savonius starts it will get the Gorlov started. Once started the Gorlov should take over and spin faster and free-spin.
Sound like a good idea?
To be quite honest, I am just getting started with wind turbines. I am more familiar with hydro-turbines. Your guess would be as good as mine. If you have a look around, there are some good forums on VAWT's. That is also how I decided on a NACA2818.
This forum seems to have quite a few people doing designs and tests:
http://www.vawts.net/f450366/v...
My Prusa just managed to print 3 pieces on one plate. This should speed up the manufacturing speed significantly. The arms seem strong enough, when multiple pieces will be attached together
Hi there,
From experience on my VAWT's (there are a couple variations for reference...) using a nonzero profile does aid sefstarting in some windconditions, but at the apparent loss of torque.
Let us know how it goes when it is printed.
I had to resort to a combination turbine (Savonius & Gorlov) to make it go, with sufficient torque to do something with it.
Cheers,
Q
Forgive my newbieness to VAWT's... when you say a non-zero profile, do you mean a helical type? (I'm guessing that a zero profile would be straight up/down for the chords?)
Hi,
I saw your designs. Given that there are so many more pieces here, it would have been difficult to include the Savonius inside. The thinking was to complete the Gorlov with a plate top and bottom and to put a Savonius on top. Should be easy to mount to a plate.
These are fanatastic! :)
Your NACA design JUST fits within my build platform!
I have been wanting to build a decent sized VAWT for quite a while.
If you believe this design really will work - I'll have a go at making a large scale version!
From looking at the other VAWT's on thingiverse, my plan was to make enough to cover up one metre of 8mm steel rod (for the centre shaft).
Pardon my newbieness to CAD design, but with the current hole for the centre - the only way I could make this fit 8mm rod would be change the hole size in CAD (one thing that I'm still unable to do as yet) or drill out the hole once it's printed.
Would you know of an easy way that I could use openscad, or any other cad program to change the hole?
I'm not yet using OpenScad, this was Solidworks.
I've uploaded a Version with an 8 mm centre hole. My thinking had been to use a 3 mm, so as to reduce the mass. With the 8 mm you may still need to drill out to fit the rod, but it should give a tighter fit then. Use a steel bit, that works much better than a bit for wood.
License
More from julienM
More from Engineering
I've completed 21 pieces now!
(6x each of the 3 twists + 3x for the bottom)
I have the 8mm steel shaft, so now I just have to drill out the centres, assemble, and print 2 pieces for the top.
The centre holes do need drilling out a bit - bit too tight a fit.
I'm just going to use skate bearings for now - have plenty :)
And then just gotta design up the post mounts.