## 5.3. Results Tab

The results are arranged in four main panels, one for the overall machine performance and one for each of the three blade rows. Results are presented for the blade rows specified by the machine configuration as appropriate:

Figure 5.10: Results Tab

A description of the parameters found on the results tab are shown in the following table. This list is the complete set of parameters obtained from a design or analysis calculation. For a meanline calculation, the diffusion factors and deviations are not shown. For a list of notation used in these descriptions, see Notation.

Table 5.4: Description of Parameters on Results Tab

Parameter | Description
--- | ---
Performance
Power | Rotor power
Torque | Rotor torque
Outlet dynamic pressure | Neglects the swirl component
Downstream dynamic pressure | The dynamic pressure in a simple pipe of diameter equal to the outer diameter of the machine. This is assumed to be “well mixed” at 2.5 diameters downstream of the rotor and again neglects any swirl component.
Aerodynamic efficiency | The adiabatic efficiency of the rotor (taken as the efficiency estimate in the meanline calculation).
System efficiency (t-t) | The efficiency of the assembly based on the specified total head rise.
System efficiency (t-s) | The efficiency of the assembly based on the static head rise (that is, total head rise - outlet dynamic pressure).
Downstream system efficiency (t-s) | The efficiency of the assembly based on the static head rise 2.5 diameters downstream of the machine, (that is total head rise - downstream dynamic pressure).
IGV
Mean deviation |
Hub deviation |
Rotor
Mean flow coeff |
Mean loading |
Mean DeHaller number |
Mean deviation |
Mean diffusion factor |
Mean gas exit angle |
Hub flow coeff |
Hub loading |
Hub DeHaller number |
Hub deviation |
Hub diffusion factor |
Hub gas exit angle |
OGV
Mean DeHaller number |
Mean deviation |
Mean diffusion factor |
Mean gas exit angle |
Hub DeHaller number |
Hub deviation |
Hub diffusion factor |
Hub gas exit angle |

All of the performance results must be positive for the design to be viable.

It is advised that the flow coefficient is < 0.8, deHaller number > 0.7, deviation < 15°, diffusion factor < 0.6 and the gas exit angle < 90°. The upper recommendation for loading is case dependent and is calculated based on a deHaller number of 0.7.

All of the above limits are shown in tooltip boxes that appear when the mouse rests over the particular parameter for a few seconds. Should the limits be exceeded in the calculation, the parameter in question is highlighted in red for easy identification of the potential problem.

Compared to the panel for the rotor, the panels for the IGV and OGV display a similar, but more limited, set of parameters.

Release 18.2 - © ANSYS, Inc. All rights reserved.