Vertical axis windmill question
Vertical axis windmill question
(OP)
Hi all
Look at this VAWT:
http://i mg379.imag eshack.us/ img379/804 4/alpha2lg jr7.th.jpg
I'm wondering what happen inside of that kind of turbine: i can't figure out if wind can enter in the middle and how it could affect turbine behaviour from inside...
I don't speak english perfectly so i've done a couple of designs to clarifying my question.
Here is the same turbine,
without shell:
http://i mg169.imag eshack.us/ img169/442 6/turbinas enzaguscio xe0.th.jpg
and with shell:
http:/ /img294.im ageshack.u s/img294/3 644/turbin aconguscio dj3.th.jpg
What kind of behavioral differences between the first one and the second one?
Thanks a lot
Look at this VAWT:
http://i
I'm wondering what happen inside of that kind of turbine: i can't figure out if wind can enter in the middle and how it could affect turbine behaviour from inside...
I don't speak english perfectly so i've done a couple of designs to clarifying my question.
Here is the same turbine,
without shell:
http://i
and with shell:
http:/
What kind of behavioral differences between the first one and the second one?
Thanks a lot





RE: Vertical axis windmill question
I try again with some bigger ones!
Real turbine:
http:/
Turbine with shell:
http
Turbine without shell:
http:/
Bye
RE: Vertical axis windmill question
There are some similar turbines with shrouds that duct in wind from one direction much like a snail shell and in those cases the air flows out the top and there is no drag from the wind against the vanes that are not in the perfect position to catch the incoming wind.
RE: Vertical axis windmill question
RE: Vertical axis windmill question
If a bridge has a support in a river, then the flow rate has to increase to get the same mass of water through a smaller area.
So in my opinion the filled cage will provide more flow over the blades and increase performance.
RE: Vertical axis windmill question
Tom Moritz
Mechanical Engineer
US Bureau of Reclamation
RE: Vertical axis windmill question
http://www.rexresearch.com/kirsten/kirsten.htm
RE: Vertical axis windmill question
The designer of this VAWT got his inspiration from sources like that. A shroud would help, like Tmoritz suggests, but implementing that would be complicated, since it would have to turn to follow the wind direction.
Do these guys offer any performance data?
Steven Fahey, CET