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Figure 53:
Geometry of a contraction
 |
The geometry of a contraction is shown in Figure 53.
It is described by the following constants (to be specified in that order on
the line beneath the *FLUID SECTION, TYPE=RESTRICTOR
CONTRACTION card):
- reduced cross section
.
- full cross section
.
- hydraulic diameter
defined by
where
is the
perimeter of the cross section.
- chamfer length
.
- chamfer angle
.
The loss coefficient for a contraction is taken from [22].
guido dhondt
2007-08-09