A Seminar on Tesla Turbines
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Tesla turbine is a bladeless turbine making use of boundary layer effect.
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A Seminar on Tesla Turbines
- 1. A Seminar On TESLA TURBINES PRESENTED BY SOUGANTH SUGATHAN MANJHIPARAMBIL ISAMEME057
- 2. “The desire that guides me in all I do is the desire to harness the forces of nature to the service of mankind.” Nikola Tesla (1856 – 1943) Dept. of Mechanical Engg. 2IESCE
- 3. CONTENTS • INTRODUCTION • CONSTRUCTION • BOUNDARY LAYER CONCEPT • THEORY OF OPERATION • EFFICIENCY OF TESLA TURBINES • APPLICATIONS • PICO HYDRO • TESLA TURBINES AND PICO HYDRO • ADVANTAGES • DISADVANTAGES • CONCLUSION • REFERENCES Dept. of Mechanical Engg. 3IESCE
- 4. INTRODUCTION • Tesla turbine is a bladeless turbine. • It was patented by Nikola Tesla in 1913. • It is a radial type turbine. • Also known as Prandtl layer turbine and boundary layer turbine. Dept. of Mechanical Engg. 4IESCE
- 5. Dept. of Mechanical Engg. 5IESCE PARTS OF A TESLA TURBINE
- 6. CONSTRUCTION There are mainly 2 parts in the turbine. Rotor • Consists of series of smooth discs mounted on a shaft . • Each disk is made with openings surrounding the shaft. • These openings act as exhaust ports through which the fluid exits. Dept. of Mechanical Engg. 6IESCE
- 7. Stator • The rotor assembly is housed within a cylindrical stator, or the stationary part of the turbine. • Each end of the stator contains a bearing for the shaft. • The stator also contains one or two inlets, into which nozzles are inserted. Dept. of Mechanical Engg. 7IESCE
- 8. • To make the turbine run, a high-pressure fluid enters the nozzles at the stator inlets. • The fluid passes between the rotor disks and causes the rotor to spin. • Eventually, the fluid exits through the exhaust ports in the center of the turbine. Dept. of Mechanical Engg. IESCE 8
- 9. BOUNDARY LAYER CONCEPT • A layer of fluid developing in flows with very high Reynolds Number, Re, that is with relatively low viscosity as compared with inertia forces. • Observed when bodies are exposed to high velocity air stream or when bodies are very large and the air stream velocity is moderate. Dept. of Mechanical Engg. 9IESCE
- 10. Dept. of Mechanical Engg. 10IESCE
- 11. THEORY OF OPERATION • As the fluid moves past each disk, adhesive forces cause the fluid molecules just above the metal surface to slow down and stick. • The molecules just above those at the surface slow down when they collide with the molecules sticking to the surface. • These molecules in turn slow down the flow just above them. Dept. of Mechanical Engg. 11IESCE
- 12. • The farther one moves away from the surface, the fewer the collisions affected by the object surface. • At the same time, viscous forces cause the molecules of the fluid to resist separation. • This generates a pulling force that is transmitted to the disk, causing the disk to move in the direction of the fluid. Dept. of Mechanical Engg. IESCE 12
- 13. Dept. of Mechanical Engg. 13IESCE
- 14. EFFICIENCY VS RPM CURVE Dept. of Mechanical Engg. 14IESCE
- 15. EFFICIENCY OF TESLA TURBINES • Tesla claimed a theoretical efficiency of the order of 95%. • Actual turbine efficiency is estimated to be about 60%. • Practical results seems to be lower than conventional turbines. Dept. of Mechanical Engg. 15IESCE
- 16. APPLICATIONS • It can be converted into a pump, called Tesla pump. • As a multiple-disk centrifugal blood pump. • Pico Hydro applications. • Fluids with high viscosities, abrasives, solid particles or two phase fluids. • As a waste pump. • As a wind turbine Dept. of Mechanical Engg. 16IESCE
- 17. PICO HYDRO • Harness the energy of flowing water at capacities smaller than 5kW. • Lowest generating cost. • Low environmental impact. • Displacement of large populations is not required. Dept. of Mechanical Engg. 17IESCE
- 18. TESLA TURBINE AND PICO HYDRO • Simple components and design. • Local setting manufacture lowers capital and maintenance costs. • Lesser risk of erosion of discs. Dept. of Mechanical Engg. 18IESCE
- 19. ADVANTAGES • Low production costs. • Simpler design and manufacture. • Can be used for a variety of fluids. • Can be easily reversed into a pump. Dept. of Mechanical Engg. 19IESCE
- 20. DISADVANTAGES • Low torque. • Proof of its efficiency compared to conventional turbines is still questionable and needs more research. • Loss of energy due to friction at high speeds. Dept. of Mechanical Engg. 20IESCE
- 21. CONCLUSION • Not compatible for applications where conventional machines are adequate. • Should be considered in applications where conventional methods are inadequate. • Applications which need small shaft power, highly viscous fluids or non-Newtonian fluids. Dept. of Mechanical Engg. 21IESCE
- 22. REFERENCES [1] Rice, W., “Tesla Turbomachinery”, International Nikola Tesla Symposium, 1991. [2] Bryan P. Ho-Yan, “Tesla Turbine for Pico Hydro Applications”, Guelph Engineering Journal, 2011. [3] S.J. Foo, W.C. Tan and M. Shahril, “Development of Tesla Turbine for Green Energy Application”, National Conference in Mechanical Engineering Research and Postgraduate Studies, 2010 Dept. of Mechanical Engg. 22IESCE
- 23. THANK YOU FOR LISTENING! Dept. of Mechanical Engg. IESCE 23 ANY QUESTIONS?
- 24. GET READY FOR THE QUIZ!! Dept. of Mechanical Engg. IESCE 24 PROBLEM???
- 25. QUESTIONS 1. What is the direction in which fluid enters and exits the turbine? 2. State a major disadvantage of Tesla turbines. 3. Why do you think the Tesla turbine is also named as Prandtl layer turbine? Dept. of Mechanical Engg. IESCE 25