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Turbomachinery

Turbomachinery. Rotating element connected to a shaft Turbine: device to extract energy from fluid stream. Pressure decrease. Pump, fan, compressor: devices to add energy to fluid stream. Pressure increase. Steady state: rotational speed of rotor does not vary. Moving gases. Fans Blowers

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Turbomachinery

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  1. Turbomachinery • Rotating element connected to a shaft • Turbine: device to extract energy from fluid stream. Pressure decrease. • Pump, fan, compressor: devices to add energy to fluid stream. Pressure increase. • Steady state: rotational speed of rotor does not vary.

  2. Moving gases • Fans • Blowers • Compressors

  3. Moving liquids • Pump • Positive displacement • Kinetic/dynamic – centrifugal pump

  4. PD pump • High discharge pressure : PRV needed • High viscosity • Shear sensitive • Relatively low volume flow • Self- priming

  5. Fluid Power Mining Solvent coating Agriculture • Elevators • Front-end loaders • Dump trucks • Fork lifts • Aircraft control surfaces • Landing gear • Dentist drill

  6. Positive Displacement Pumps

  7. Positive displacement • Rotary piston • Swash plate

  8. Fluid Power • Mechanical efficiency • Volumetric efficiency • Conversion factors

  9. Radial pump • Centrifugal • Chemical manufacture • Petroleum refining • Pulp & paper • Water treatment • Chillers for A/C

  10. Pump Curve • Discharge head vs discharge rate • Shut-off head • Free discharge

  11. System Head Curve • Fixed head • Variable head

  12. Operating Point • Intersection pump and system head curves • Available flow rate

  13. Assignment • Chapter 13

  14. References • Images & examples • Mechanics of Fluids, 3rd Edition, Potter & Wiggert, Brooks & Cole • Applied Fluid Mechanics, 6th Edition, Mott, Prentice Hall • Engineering Fluid Mechanics, 5th Edition Crowe, & Roberson, Wiley • Fluid Mechanics Cengel & Cimbala McGraw Hill

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