Restrictor, Wall Orifice

Properties: adiabatic, not isentropic, directional, $ A$-outlet based restrictor

Figure 97: Geometry of a wall orifice

The geometry of an wall orifice is shown in Figure 97. 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):

The loss coefficient for a wall orifice is taken from [34].

By specifying the parameter LIQUID on the *FLUID SECTION card the loss is calculated for liquids. In the absence of this parameter, compressible losses are calculated.