Pressure ratio and efficiency are output as functions of flow and speed, and detailed velocity diagram output can be optionally presented. A map file in NEPP format can also be obtained. The basic inputs are pressure ratio, inlet corrected flow per unit area, and stall margin. The basic inputs are pressure ratio, inlet corrected flow per unit area, and stall margin. This is not the typical blade row by blade row bookkeeping of mass and energy.
All stages have the same stator exit angle.
Stage by stage tailoring of the velocity diagrams is not allowed. Only inlet and exit diameters are specified, and the stage mean diameters vary linearly. The loss model is a simple viscous type related to the velocity diagrams. A simple blading model provides solidities and stagger angles. Turbine coolant flows and temperatures can be specified.