Flow calculations

1
Flow calculations
1
Flow calculations

• Dynamic pressure
• Pressure drop
• Bernoulli's equation
• Fan curves

• Åke Mälhammar
• Frigus Primore
• malhammar.ake_at_wanadoo.fr

2
Bernoulli's equation 1
2
Bernoulli's equation
Total pressure
3
Bernoulli's equation 2
3
4
Pressure losses
4
5
Expansion
5
6
Contracting jets
6
7
Fan curves
7
8
Electronic devices
8
9
Flow distribution 1
9
Friction only
Dynamic only
Path
p
p
Z-path
p
p
U-path
10
Flow distribution 2
10
D
D
11
Flow distribution 3
11
D