### 8.3.1. Results Tab

Figure 8.3: Results Tab

This tab contains the output results data and is automatically displayed on execution of the calculation.

The results are arranged in the following main blocks:

- Input Data Summary

- Performance

- Inlet velocities

- Exit velocities at shroud

- Impeller geometry

- Nozzle geometry

This information is summarized in the following table.

Table 8.2: Definition of Parameters on Results Tab

Abbreviated name | Parameter | SI units | Imperial units
--- | --- | --- | ---
Input data summary
T0 | Inlet stagnation temperature | K | degF
P0 | Inlet stagnation pressure | Pa | lbf/in^2
Mass | mass flow rate | kg/s | lb/s
Exp tt | Total- total expansion ratio | - | -
N | Rotational speed | rev/min | rev/min
U/C | Blade speed ratio | - | -
Stg eff | Stage total-total isentropic efficiency | % | %
Noz eff | Nozzle total-static isentropic efficiency | % | %
Cp | Mean specific heat at constant pressure | J/kg K | btu/lb F
R | Gas constant | J/kg K | btu/lb F
Imp Thk | Impeller vane thickness at exit | mm | in
Imp Vanes | Number of impeller vanes | mm | in
R3shr/R2 | Exducer shroud diameter/inlet diameter | - | -
R3hub/R2 | Exducer hub diameter/inlet diameter | - | -
Performance
W3s/W2 | Ratio of exit shroud relative velocity to inlet relative velocity | - | -
Vax3/U2 | Ratio of exit shroud axial velocity to tip speed | - | -
Exp ts | Total-static expansion ratio | - | -
Q/Qchk | Flow function/flow function choking value | - | -
MrtT/P |  | kg-T0.5/s-kPa | -
Pwr | Power | kW | hp
Rctn | Reaction | - | -
U/C ts | Blade speed ratio with exit static isentropic conditions as reference for C. C is the spouting velocity; that is, the velocity that would be obtained if the gas were expanded isentropically from the inlet stagnation enthalpy to the exit condition, so is given by: | - | -
dh/U^2 |  | - | -
Ns tt | Specific speed | - | -
T3 | Static temperature at exit | K | degF
T03 | Stagnation temperature at exit | K | degF
P3 | Static pressure at exit | Pa | lbf/in2
P03 | Stagnation pressure at exit | Pa | lbf/in2
Eff: |  |  |
Stg ts | Total-static stage efficiency | - | -
Stg tt | Total-total stage efficiency | - | -
Imp ts | Total-static impeller efficiency | - | -
Imp tt | Total-total impeller efficiency | - | -
Losses: | (only present if Correlation has been selected for the efficiency) |  |
Load | Loss coefficient due to blade loading | - | -
Fric | Loss coefficient due to friction | - | -
Clear | Loss coefficient due to clearance | - | -
Inc | Loss coefficient due to incidence (‘Suhrmann only) | - | -
Exit | Loss coefficient due to exit kinetic energy | - | -
Tot | Total of above losses | - | -
Inlet velocities
Mabs | Absolute Mach number | - | -
Mrel | Relative Mach number | - | -
U2 | Blade speed | m/s | ft/s
V2 | Absolute velocity | m/s | ft/s
W2 | Relative velocity | m/s | ft/s
Vw2 | Absolute whirl velocity | m/s | ft/s
Vr2 | Radial velocity | m/s | ft/s
Alpha2 | Absolute flow angle, relative to radial | deg | deg
Beta2 | Relative flow angle, relative to radial | deg | deg
Exit velocities at shroud
Mabs | Absolute Mach number | - | -
Mrel | Relative Mach number | - | -
U3 | Blade speed | m/s | ft/s
V3 | Absolute velocity | m/s | ft/s
W3 | Relative velocity | m/s | ft/s
Vw3 | Absolute whirl velocity | m/s | ft/s
Vax3 | Axial velocity | m/s | ft/s
Alpha3 | Absolute flow angle, relative to axial | deg | deg
Beta3 | Relative flow angle, relative to axial | deg | deg
Impeller geometry
d2 | Inlet diameter | mm | in
Tip width | Tip width | mm | in
d3hub | Exducer diameter at hub | mm | in
d3shr | Exducer diameter at shroud | mm | in
d2/d3rms | Ratio of inlet diam/exit diam at rms | - | -
Beta3rms | Relative flow angle at rms | deg | deg
beta3shr | Relative flow angle at shroud | deg | deg
Beta3hub | Relative flow angle at hub | deg | deg
L/D | Axial length / diameter | - | -
Nozzle geometry
Q/Qchk | Flow function/flow function choking value | - | -
Inner dia | Diameter at trailing-edge | mm | in
Vless A/R | A/R ratio for a vaneless nozzle | mm | in
Tht area | Vaned nozzle throat area | mm2 | in2

The velocity triangles for the computed design are shown on the Velocity triangles tab (Figure 8.4: Velocity Triangles Tab)

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