7 Dynamic Similitude
274
head produced by a pump (P1) and the head consumed by the connected pipe (L1)
between the suction reservoir and the node in the network (N). The thus obtained
net characteristic of the left-hand branch is denoted by B1 in Fig. 7.19. The characteristic of the parallel connection of the two branches may then be determined as
before, i.e. by summing the flow rates of the net characteristics B1 and B2 for equal
head. The load on the resulting characteristic is the branch from the node N to the
discharge reservoir.
7.5.3 Series Connection of Fans
When two fans are connected in series (different characteristics a and a’ in
Fig. 7.20), the characteristic of the series connection is found by adding the pressure
Fig. 7.18 Parallel connection of identical fans with a
minimum and a maximum in
the characteristic
Fig. 7.17 Parallel connection of two fans with largely
different dimensions
274
head produced by a pump (P1) and the head consumed by the connected pipe (L1)
between the suction reservoir and the node in the network (N). The thus obtained
net characteristic of the left-hand branch is denoted by B1 in Fig. 7.19. The characteristic of the parallel connection of the two branches may then be determined as
before, i.e. by summing the flow rates of the net characteristics B1 and B2 for equal
head. The load on the resulting characteristic is the branch from the node N to the
discharge reservoir.
7.5.3 Series Connection of Fans
When two fans are connected in series (different characteristics a and a’ in
Fig. 7.20), the characteristic of the series connection is found by adding the pressure
Fig. 7.18 Parallel connection of identical fans with a
minimum and a maximum in
the characteristic
Fig. 7.17 Parallel connection of two fans with largely
different dimensions