6.2 Fans
217
Power (Pw):
Pw = Pw 0
N
N 0
3
(6.15)
Diameter Variation
For two dynamically similar fans of diameter D 0 and D (Fig. 6.17) rotating at the
same speed, Eqs. 6.16, 6.17 and 6.18 can be employed.
Flow rate (Q):
Q = Q 0
D
D 0
3
(6.16)
Pressure (P):
P = P 0
D
D 0
2
(6.17)
Power (Pw):
Pw = Pw 0
D
D 0
5
(6.18)
Fig. 6.17 Schematization of two similar fans of diameters D 0 and D, with the same rotational speed
(N)
217
Power (Pw):
Pw = Pw 0
N
N 0
3
(6.15)
Diameter Variation
For two dynamically similar fans of diameter D 0 and D (Fig. 6.17) rotating at the
same speed, Eqs. 6.16, 6.17 and 6.18 can be employed.
Flow rate (Q):
Q = Q 0
D
D 0
3
(6.16)
Pressure (P):
P = P 0
D
D 0
2
(6.17)
Power (Pw):
Pw = Pw 0
D
D 0
5
(6.18)
Fig. 6.17 Schematization of two similar fans of diameters D 0 and D, with the same rotational speed
(N)