Sharp VAWT (Sharp style Vertical Axis Wind Turbine; Passive Cycloturbine)
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- Опубликовано: 19 ноя 2024
- Some construction details and video footage of an unloaded Sharp style VAWT in modest wind conditions. The Sharp VAWT is based on a patent by Peter Allen Sharp. The wing is allowed to pivot at a point approximately 1/4 chord inward from the leading edge of the wing. Wing rotation is confined to about +/- 45 degrees. Counter weights are added to locate the center of mass near the leading edge of the wing. With this arrangement, the apparent wind causes the wing to weathervane while the centrifugal force of the mass pushes the wing into a favorable angle of attack to produce lift and torque on the shaft. While the turbine works well with two wings, this example has four to cut down on force and torque pulsation. Note: the wing mass of 1.50 kg includes the counter weight. The mass per square meter of wing area (wing loading) works out to be 5.2 kg/m^2. In my opinion, it would be better to have a wing loading of around 2.2 to 3.0 kg/m^2. Also, the wing chord is 180mm not 180m.
Your variable pitch design is very good, you have developed so far, specially air foil design?
Can you commercialize it internationally on you tube and Amazon supply world wise
Have a good wish for you? ❤❤❤❤❤❤❤❤
you might be able to get some estimate of max wind speeds it can tolerate based on the deflection of the wings in this video. Of course there are other factors too, but could be useful.
E for Effort you may want to look into a C-Rotor type wing though.
Very interesting build Michael. Thank you for the video. I'm interested in how you shaped the foam core blades and what material you have used please? I've only recently found the Sharp Vawt concept while trying to work out a passive blade pitch mechanism myself but love the simplicity. Keen to see any further data when you get to put a generator on yours. Thank you.
I ordered the blades from Mohr Composites since I did not want to cut the spar holes myself. I do not plan to put a generator on this one. Originally, I wanted to use it to compress air or pump water. But after walking near it one night and realizing there were 2x4's and weights moving rapidly near my head, I decided it was too dangerous for its location and I took it down. I kept the parts in case I want to put it up again, but decided to build more site appropriate turbines.
@@MickEMaus3000 it's mostly narrated that vawt turbine are not productive enough kindly update us about its performance in low medium & high speeds plz ..
Awesome. Fix the issues. Put a large pulley on the turbine, then offset the generator with a belt. Center the turbine on the pole. That offset bearing creates a lever.
Good Demo by you
🌹🌹🌹🌹🌹🌹🌹🌹🌹
from what I understood, a french university designed two, one for water and one for air.
I need to look if there's content one it somewhere !
I'd be interested to see it! Thanks.
I am developing 1kw to 3kw wind turbine with axial Flux flow motor ( AFFM), under progress at present please?
The wind is strong and it seems to be a bit shaky.
Definitely too large for that pole. I have since taken it down and am working on a smaller, more appropriately sized VAWT.
Wing chord is 1.80 meter or 180 meter which one is correct ? Please, 180 meter is not possible, written in descritipion or statement?
Thank you for pointing out the typo! It is supposed to be 180 mm. The correction is now noted in the description.
I am a manucturer and mechanical designer ,
Production degree from UET Lahore Pakistan 1990
Remarkable info at your end on you tube, Bundle of thanks
What is the minimum wind speed needed for your wind 0:04 turbine and how much output in watt - second at 3meter per second wind blowing?, please share with me
I will wait for your feedback please
I don't have any data. I just wanted to see if it would work.
Looks like you're getting decent rpm in that wind you were getting near the end. Not a "runaway turbine" by any means but good speed for the diameter. Did you use 4 instead of 3 blades for easier building?
Yes, the four blades was for easier building. If I went with three, I'd have to have a strong hub and cantilever arms off from that. Plus the four blades gave me a higher frequency of pulses on the pole that I hoped would get it above the natural frequency and help stop the shaking.
@@MickEMaus3000This driveway and area look familiar from some other vids? I'd be tempted to increase the number of blades rather than reduce because at that diameter you'll be breaking the sound barrier soon LOL, Once 3 blades get up to any speed the pulsing goes away as the turbine essentially turns into a large cylinder but they have to be balanced , mounted on the structure, within grams or way less for smaller diameters
also; a quick way to increase your output 5-10%? would be to cover the leading edge of those arms with some half cove or plastic tubing cut in half. Don't know if your blades will stand the extra rpm though... maybe get a load on there soon
@@itsandbits1 I took that turbine down because I did not feel comfortable leaving such a large turbine up so close to the ground. When the wind blew at night, that thing would be swinging around where it could bonk someone in the head if they were wandering about. It was quiet and fast, and would hurt even if the wings were foam. I'm working on a smaller one that would be more permanent and appropriate for the pole.
@@itsandbits1 Yes, that driveway has starred in a number of old videos that I have since moved to Rumble. :-) I posted this video on RUclips to give a little more exposure to a design idea that I thought needed some attention.
Congratulations..
Use GAYK of GMRT Túrbine
Does it make any power???...........Z
I'm sure it would if it had a generator. I intended to drive an air pump with it, but took it down because it was much too large for that pole.