Restrictor, Contraction

Properties: adiabatic, not isentropic, directional, outlet based restrictor

Figure 95: Geometry of a contraction

The geometry of a contraction is shown in Figure 95. It is described by the following constants (to be specified in that order on the line beneath the *FLUID SECTION, TYPE=RESTRICTOR CONTRACTION card):

The loss coefficient for a contraction 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.

Example files: piperestrictor, restrictor, restrictor-oil.