Wind Turbine Blade
Hello, i am a energy commerce major at texas tech university. I do not pretend to know the all the engineering thats goes into commercial windmills, but i had an idea for home windmills. I understand that commercial windmill blades are made out of carbon fiber because of its strength and light weight. I do believe this is where much of the cost of commercial windmills is incurred. I am proposing that home turbine blades can be made using thin aluminum metal and forming a hollow structure that can be pressurized with helium of the inside. The helium pressure gives the thin aluminum more strength and decreases it weight. It has been a while since a have taken chemistry so i'm not sure if the helium would diffuse through the aluminum or not my guess would be it would eventually. Therefore the inside of the blade would have to be coated with latex or something. Is this a dumb idea or could this possibly work?+3 Other Responses
Wind Turbine Design
In water turbine design a dimensionless number defines the shape of the turbine wheel or rotor or whatever it is called. For high numbers it starts with the 3 bladed kaplan wheel, then 4, 5, 6 to 8 blades, then it goes to the francis turbine and reaches the pelton wheel.
Has there been something similar in the wind turbine industry? I visited the wind power expo and had some interesting discussions why are practically all wind turbines 3 bladed? Is it because with wind we do not have that high head available and we are at the bottom end, that is 2 or 3 bladed range. Yet, i like to look at wind turbines, vertical that could look more like a francis turbine.+2 Other Responses