Venturi Wind Turbine

The venturi wind turbine uses Bernoulli's Principle to create a low pressure area by accelerating the air flow between the rotors. This helps eliminate the drag of the air foils as they return against the wind.
The patented turbine was invented in Canada.
The turbine incorporates an axial flux, permanent magnet alternator designed by Hugh Piggott of the U.K..
The air foils I am using are the work of wind enthusiast Ed Lenz of the U.S.
The video was filmed during recent private testing at the University of Manitoba wind tunnel.
The turbine runs very well and a few minor adjustments are currently under way.
I am also building a large model that I hope to have completed by fall of 2008.

Category:

Science & Technology

[stand52]

Did I hear you say 4 amps at ostensibly 12 volts? If that is true, it only amounts to 50 watts or so? What was the speed of the wind in the wind tunnel? It looked like it was in excess of 20 MPH.

[bigdbez]

We stopped testing at 42 MPH (19.2m/s). Peak load volts was 17.7v while producing 3.3 amps. The efficiency droped as more power was produced, partly because of alternator inefficiency but mostly because the turbine was stalling. The desired TSR under load is @ .8 but it was averaging @.55. I am working to solve this problem with the new turbine.

[katchupoy01]

Hey guys... good job. but can you explain.. it is on a wind tunnel? what is the water that you are saying on the wall.... i cant hear anything inside that room...

[bigdbez]

The tests were done in a wind tunnel to provide a controlled enviroment. This allowed me to collect acurate data such as power output vs windspeed, tip speed ratio etc.

The water manometer on the wall is a tool that shows the difference in air pressure created by the venturi. Wind tends to flow around an obstruction, (like putting your hand in a stream of water) The venturi helps "pull" this air through the machine.

[domyaska]

thanks a lot for sharing!!!!!!!!!!

[brotherlybrother11]

can you ue this turbine for a skyding simulator like skyventur?and how much does it cost?