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Notes (will format into a better document later):

• inWC (inches of water column): Pressure unit, frequently used in fans to represent small changes in pressure
• What is static pressure?
  • Relative pressure to ATM?
  • fans produce positive static pressure
• Air moving through a pipe (constant diameter) will have max air velocity at center and zero at pipe walls
• Flow rate is calculated as : Q (flow rate) = A (cross-sectional area) x V (average velocity of the fluid)
  • Avg velocity is 90% the max velocity of the velocity
• Find Reynold's Number of the fluid:
  • Needed to see if the flow is laminar or turbulent
    • If Re < 2000, laminar flow
    • If higher turbulent
• Total Pressure: Static Pressure + Velocity Pressure 
  • Used to calculate mech efficiency
• Bernoulli's principle of continuity:
  • When air velocity increases, the static pressure decreases.
  • When air velocity decreases, the static pressure increases.
• Centrifugal fans with FC Blades (Forward Curved)

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