PHYSICS 3K03 Lecture Notes - Lecture 12: Pipe Networks, Water Horse, Wetted Perimeter
22 Jun 2018
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Dimensional
Analysis
Buckingham Pi Theorem
- # of dimensionless variables = # of parameters - # of primary dimensions
- Choose whenever possible
- Make sure repeated variables are not dimensionless and has all the primary dimensions
Fully developed
pipe flow
Pressure drop:
Friction factor in laminar flow:
Friction factor in turbulent flow: look on moody chart
roughness, pipe diameter
Head loss due to friction (major losses)
Energy conservation:
Minor losses:
loss coefficient; look up in table
- Make sure to use the right velocity
Total head loss:
Hydraulic diameter: (non-round pipes)
cross-section area
wetted perimeter
Pipe networks Pipes in series:
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- Volume flow rate is constant; head loss is summation of parts
Pipes in parallel
- Head loss is constant; volume flow rate is sum of parts
Pumps Suction head:
Discharge head:
Pump head:
Net positive pressure head:
Centrigual
pumps
Pressure head:
Water horse power: (power delivered to the water)
Breaking horse power:
Capacity coefficient:
Head coefficient:
Power coefficient:
Efficiency:
revolutions per minute
Pump specific speed:
Dimensional
Analysis
Buckingham Pi Theorem
find more resources at oneclass.com
find more resources at oneclass.com
