Flow through bends will always
occurs because there is not piping system in the boiler plant or power plant
which only consists of straight pipes but also some bends. Bends in a piping
system or perhaps duct process generate losses in pressure induced by momentum
exchanges and also friction in fluid which in turn effect on alterations in
flow way.
Due to the fact the length of
axial bend is usually integrated with the friction reduction of straight length
in the piping system or perhaps ducts process, it's practical to take away a
computed equal to friction reduction in straight length which experimentally
establish the factor of pressure loss in the bends. These kinds of adjusted
records form empirically in the base of the loss aspect (Nb) in the bends.
The amount of pressure losses
pertaining to fluid flow through bends inside circular pipe in surplus of direct pipe
friction change marginally together with Reynolds numbers under 150, 000.
Regarding Reynolds numbers over 150, 000, they're realistically consistent and
rely only on the ratio of bend radius to the pipe internal diameter (r/D).
Regarding industrial pipe, the impact of Reynolds number is minimal. The mixed
influence of bend angle and the ratio of radius, with regard to velocity heads
will be established in Figure 1.
Figure 1: Flow through Bends (Source: Book-Babcock-Wilcox) |
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