Tesla turbine

The Tesla turbine is a bladeless centripetal flow turbine invented by Nikola Tesla in 1913. Nozzles apply a moving fluid to the edges of a set of discs. The engine uses smooth discs rotating in a chamber to generate rotational movement due to the exchange of momentum between the fluid and the discs. The discs are arranged in an orientation similar to a stack of CDs on a pole.

The Tesla turbine uses the boundary-layer effect, instead of the method employed by more conventional turbines, wherein a fluid acts on blades. The Tesla turbine is also referred to as the bladeless turbine, boundary-layer turbine, cohesion-type turbine, and Prandtl-layer turbine. The latter is named for Ludwig Prandtl. Bioengineering researchers have additionally referred to the Tesla turbine as a multiple-disk centrifugal pump.

One of Tesla's intended implementations for this turbine was for the generation of geothermal power, which he described in his work Our Future Motive Power.