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by breischl
1882 days ago
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Tangentially, I ran into the bladeless vortex concept recently (https://vortexbladeless.com/), do you have a take on that? It seems like all your concerns/critiques from above would apply equally, but then I don't have any real expertise in the area. |
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1. The surface area of the machine is small. Think of this as the area that can capture power from the wind. Due to the cylindrical shape this is way smaller than the rotor area of a HAWT or even a VAWT.
2. Vortex induced vibration [1] is a real phenomenon that can extract energy from a flow. However, to extract this energy, the natural frequency of the structure must synchronize with the vortex shedding frequency of the flow around the structure. This is called "lock-in". Since the wind is a highly variable resource, it will not consistently be in this "lock-in" range in real-world conditions. To give perspective on the norm for HAWTs, pitch control for the blades is used along with generator torque control to achieve power production from 3 m/s all the way to the maximum (cut-out) wind speed of ~25 m/s.
[1]https://en.wikipedia.org/wiki/Vortex-induced_vibration