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Wednesday, February 13, 2013
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VIBRATION OF TURBOMACHINE BLADE COUPLED WITH FRICTION PINS
The work principle of turbomachine: the energy transfer being carried out by the action of one or more rotating blade rows. The dynamic action of rotating blades sets up forces between the blades and fluid while the components of these forces in the direction of blade motion give rise to the energy transfer between the blades and fluid.
The type of turbomachines fall into 2 categories depending on:
whether work is done by the fluid on the rotating member
Or
Any devices that extracts energy from or imparts energy to a continuously moving stream of fluid (liquid or gas) can be called a turbomachine. The Examples of turbomachine: windmills, waterwheels, ship propeller, hydraulic and gas turbines, pump and compressor.
The work principle of turbomachine: the energy transfer being carried out by the action of one or more rotating blade rows. The dynamic action of rotating blades sets up forces between the blades and fluid while the components of these forces in the direction of blade motion give rise to the energy transfer between the blades and fluid.
The type of turbomachines fall into 2 categories depending on:
whether work is done by the fluid on the rotating member
Or
whether work is done by the rotating member on the fluid
Work is done by fluid, examples:
Axial flow hydraulic turbine
Radial flow hydraulic turbine
Mixed flow hydraulic turbine
Axial flow gas turbine
Pelton wheel hydraulic turbine
Work is done on fluid, examples:
Axial flow pump
Centrifugal pump
Axial flow compressor
Centrifugal compressor
Radial flow fan
The type of turbomachines can also be defined as
the manner of fluid movement through the rotating member
If the flow is essentially axial with no radial movement of the streamlines then the machine is called an axial flow machine.
If the flow is radial, the machine is classed as a radial flow centrifugal machine
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