Fluid Mechanics and Machinery: Unit 4: Turbines
Propeller Turbine
Characteristic, Layout Diagram, Working Principle
The need to utilize low heads where large volume of water is available makes it essential to provide a large flow area and to run the machine at very low speeds.
PROPELLER TURBINE The need to utilize low heads where large volume of water is available makes it essential to provide a large flow area and to run the machine at very low speeds. The propeller turbine is a reaction turbine used for heads between 4m to 80m. It is purely axial-flow device providing the largest possible flow area that will utilize a large volume of water and still obtain flow velocities which are not two large. The propeller turbine consists of an axial flow runner with four to six or at the most ten blades of air-foil shape. The runner is generally kept horizontal, i.e. the shaft is vertical. The blades resemble the propeller of a ship. In the propeller turbine, as in Francis turbine, the runner blades are fixed and non-adjustable. The spiral casing and guide blades are similar to those in Francis turbine. The guide mechanism is similar to that in a Francis turbine.
Fluid Mechanics and Machinery: Unit 4: Turbines : Tag: : Characteristic, Layout Diagram, Working Principle - Propeller Turbine
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Fluid Mechanics and Machinery
CE3391 3rd semester Mechanical Dept | 2021 Regulation | 3rd Semester Mechanical Dept 2021 Regulation