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 Compressors

Moving liquids

Pump• Positive displacement• Kinetic/dynamic – centrifugal pump

PD pump

High discharge pressure : PRV needed High viscosity Shear sensitive Relatively low volume flow Self- priming

Fluid Power

Elevators Front-end loaders Dump trucks Fork lifts Aircraft control

surfaces Landing gear Dentist drill

Mining Solvent coating Agriculture

Positive Displacement Pumps

Positive displacement

Rotary piston Swash plate

Fluid Power

Mechanical efficiency Volumetric efficiency Conversion factors

Radial pump

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

Pump Curve

Discharge head vs discharge rate Shut-off head Free discharge

System Head Curve Fixed head Variable head

Operating Point

Intersection pump and system head curves

Available flow rate

Assignment

Chapter 13

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