Axial Turbine

·         The kinetic energy of combustion gas is converted to mechanical power by the its impulse or reaction with a series of blades arranged around the circumference of a wheel or cylinder ·         Stationary blades / guide blades act as nozzles and they convert fluid pressure into kinetic energy. The following rotating blades convert kinetic energy into…

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Radial Turbine

·         Flow enters the impeller radially and exits axially. These machines are termed as inward flow turbines. ·         A radial turbine stage consists of volute, nozzle guide vanes and impeller. ·         High pressure gas passes through the volute and / or nozzle guide vanes, increasing its kinetic energy The high velocity gas transfers its energy to the impeller…

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Centrifugal Compressor

·         The flow enters a three-dimensional impeller axially through an inlet duct. The impeller may be preceded by a row of inlet guide vanes. ·         The impeller through its blades imparts velocity and pressure to the gas which flows in radial direction. ·         The rise in pressure takes place due to the centrifugal action of the impeller and…

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Ducted Fan

·         A ducted fan is a propulsion arrangement, whereby a propeller is mounted within a cylindrical shroud or duct.  ·         The duct prevents losses in thrust from the tips of the propeller and if the duct has an airfoil cross-section , it can provide additional thrust of its own ·         Ducted fan propulsion is used in aircraft, airboats…

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Propellers

·         A propeller is a device which transmits power by converting it into thrust for propulsion of a vehicle though a fluid by rotating two or more twisted blades about a central shaft, in a manner analogous to rotating a screw through a solid. ·         The blades of a propeller act as rotating wings and produce force…

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Power Absorbing Turbomachines

Fans – air is the working medium ·         axial flow ·        radial flow (centrifugal) Blowers – air is the working medium ·         axial flow ·         radial flow (centrifugal) Propellers and Ducted Fans – air is the working medium Compressors – air is the working medium ·         reciprocating ·         rotary §  axial flow §  radial flow (centrifugal) §  mixed flow Pumps – water is the working medium ·         reciprocating ·         rotary §  axial…

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Introduction to Turbomachinery

Turbomachinery, in mechanical engineering, describes machines that transfer energy between a rotor and a fluid, including both turbines and compressors. While a turbine transfers energy from a fluid to a rotor, a compressor transfers energy from a rotor to a fluid. These two types of machines are governed by the same basic relationships including Newton’s second Law of Motion and Euler’s pump and turbine equation for compressible fluids. Centrifugal pumps are also turbomachines…

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