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Figure 61:
Geometry of a wall orifice
 |
The geometry of an wall orifice is shown in Figure 61.
It is described by the following constants (to be specified in that order on
the line beneath the *FLUID SECTION, TYPE=RESTRICTOR
WALL ORIFICE card):
- reduced cross section
.
- hydraulic diameter
defined by
where
is the
perimeter of the cross section.
- oil mass flow in the restrictor (only if the OIL parameter is used to define
the kind of oil in the *FLUID SECTION card)
The loss coefficient for a wall orifice is taken from [23].
guido dhondt
2009-08-12