A Theoretical Study on Surface Finish, Spacing between Discs and Performance of Tesla Turbine

Abstract: This turbine, invented by Nikola Tesla in (1856-1943), is a bladeless turbine. Tesla turbine disks and a flexible test rig was designed and manufactured, and experimental results are studied. An analysis of the performance and efficiency of the tesla turbine is carried out. The entire study of the flexible test rig has been explained in detail. In this Turbine there are no blades, instead parallel and closely spaced discs were used. Resistance to flow of fluid between the plates results in the energy transfer to the shaft on one side. High velocity water enters the disk at the inlet pack through nozzle path tangent towards the outer edge of the discs. Convergent nozzle imparts higher velocity water jet tangentially on disc. Lower-energy water spirals towards the exit port at the centre, adhesion, drag and centrifugal forces continue to convert the kinetic energy to rotate the shaft. The results of the study represent various steps towards the development of boundary layer turbine. It has been determined that the surface roughness and spacing has a major part in the performance of the tesla disc turbines significantly. Efficiency can be improved at least up to 45%, which has been deemed achievable. Keywords: Boundary layer Turbine, disc Turbine, bladeless, Tesla. Turbine