The following standard GSP components include pressure loss models:

•Inlet

In the inlet, aerodynamic pressure loss (due to friction) is represented by the ram recovery factor RR which is equal to (1-dP/Pt) with dP/Pt as relative pressure loss.

•Duct

Duct aerodynamic pressure loss is represented by relative pressure loss functions or maps.

•Combustor

In the combustor two types of pressure loss can be specified:

- aerodynamic pressure loss represented by relative pressure loss functions or maps,

- fundamental pressure loss determined from the increase in flow momentum occurring with temperature rise in the flow due to acceleration of the gasses.

•Heat exchanger

Separate pressure losses can be specified in the two flow passages of the heat exchanger / recuperator component model, both aerodynamic and fundamental similar to the combustor component.

With relative pressure loss specified in the design point, several options exist to determine off-design pressure loss:

•User specified (off-design)

Relative pressure loss remains equal to the design value unless the user specifies an off-design value.

•User specified design only

Relative off-design pressure loss is calculated from the design value and the corrected entry mass flow maintaining a proportional relation between relative pressure loss and squared corrected entry mass flow (i.e. proportional to density*velocity2). Off-design pressure loss is not user specified directly!

•Relative pressure loss map

Relative pressure loss is obtained from a map. The map type depends on the component (see the sections on the particular component). Off-design pressure loss is not user specified directly!