This function group computes the properties of quasi-2D isentropic flow through a DeLaval nozzle, as described in [JDAnderson1982].
The following properties are computed:
| I | Property | Description |
| 1 | | Mach number |
| 2 | | Pressure ratio |
| 3 | | Density ratio |
| 4 | | Temperature ratio |
| 5 | | Critical area ratio |