Lenz2 Blade Simulation

This is an OpenFOAM simulation of a Lenz2 blade. The solver is IcoDyMFoam. The blade is 18" from the center and is rotating at 60 RPM. The wind is 15 MPH (6.7 m/s). The torques shown are for a 1.0 cm long blade. So multiply by 100 for a meter long blade.

Category:

Science & Technology

Tags:

• CFD
• OpenFOAM
• Lenz2
• Wind
• Turbine
• Science
• Simulation

[HeavyDemir]

Dam cool stuff, keep it coming

[sjh7132]

@HeavyDemir

This was when I was just learning now to simulate. I'm much better at it now. :-)

[sjh7132]

You have to use the Openfoam-1.5-dev version (maybe 1.6 now). The interface to the moving grid is called GGI (general grid interface, I think). A search on those terms might get you something.

[trailkeeper]

I can see in the graph, and taking the top of the vid area as 0 degrees, that torque is low or negative in fact (I guess this would be drag then) at 0 degrees, and then it's a bit low at 180 degrees.A very high peak at 90 degrees, and a fairly high peak at 270 degrees.Having two peaks is a good, hence that blade design is good. I guessing that things for the turbine system will change if another blade is introduced at 180 degrees - perhaps to add some torque into the system for when it was low?

[sjh7132]

The normal lenz2 turbine uses 3 blades and that helps balance the torque all the way around.

[MySchizoBuddy]

Can you do a 3D simulation. Or how do you translate a 2D simulation into 3D result.

[Keveeee2000]

Awesome job!

I have been working on a modified version of the Lenz 2.

It would be interesting to see how it would work in this sim.

[FreeMagneticEnergy]

This is really awesome. The vertex data starting at 1:38 reminds me of the formation of hurricanes.

[LinuxRex2]

This is great! The vertex based data looks much better now. BTW, how do you move your mesh in OpenFoam? How do you define the interface region between the static portion of your mesh with the moving circular mesh? Do you have any kind link you could post that shows us how to move the mesh? Cheers!

[Caleb6543]

That is fantastic!