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, 6 th Edition, Mott, Prentice Hall Engineering Fluid Mechanics, 5 th Edition Crowe, & Roberson, Wiley Fluid Mechanics Cengel & Cimbala McGraw Hill