## 6.2. Data Review and Edit

The input data can be specified on the Duty and Aerodynamic Data, Gas properties and Geometry tabs of the Vista Centrifugal Compressor Design dialog box, and also (or alternatively) in the Properties view for the Blade Design cell.

The input properties of the Blade Design cell are shown in the following table.

Table 6.1: Input Properties of Blade Design Cell of Vista CCD System

Property | Notes
--- | ---
General
BladeModeler units | [mm | cm | in | ft | m]
Aerodynamic inputs
Pressure ratio t-t |
Mass flow rate |
Rotational speed |
Inlet stagnation temperature |
Inlet stagnation pressure |
Inlet Angle |
Radial distribution | [constant angle | free vortex | solid body rotation | linear variation of Vw]
Vw ratio | Only for Radial distribution set to `linear variation of Vw`
Shroud incidence method | [specified incidence | specified choke]
Incidence at shroud | Only for Shroud incidence method set to `specified incidence`
Choke | Only for Shroud incidence method set to `specified choke`
Stage efficiency | [User defined | Correlation]
Isentropic/Polytropic | [Polytropic | Isentropic] Only for Stage efficiency set to `User defined`
Isentropic efficiency | Only for Isentropic/Polytropic set to `Isentropic`
Polytropic efficiency | Only for Isentropic/Polytropic set to `Polytropic`
Correlation | [Casey-Robinson | Casey-Marty | Rodgers] Only for Stage efficiency set to `Correlation`
Reynolds number correction | [Select | Clear]
Tip clearance & shroud correction | [Select | Clear]
Impeller isentropic efficiency calc | [Link to stage | User specified]
Impeller isentropic efficiency | Only for Impeller isentropic efficiency set to `User specified`
Power input factor calc | [Correlation | User specified]
Power input factor | Only for Power input factor set to `User specified`
Merid. velocity gradient |
Relative velocity ratio |
Gas property inputs
Gas model | [Ideal gas | Real gas]
Gas properties | [Select material | User specified]
Material | [Select from list]] Only for Gas properties set to `Select material`
Kinematic viscosity | [Sutherland (air) | User specified] Only for Gas properties set to `User specified`
Kinematic viscosity | Only for Kinematic viscosity set to `User specified`
Gas Constant | Only for Gas properties set to `User specified`
Gamma | Only for Gas properties set to `User specified` and Gas model set to `Ideal gas`
Critical pressure | Only for Gas properties set to `User specified` and Gas model set to `Real gas`
Critical temperature | Only for Gas properties set to `User specified` and Gas model set to `Real gas`
Acentric factor | Only for Gas properties set to `User specified` and Gas model set to `Real gas`
Various constants for Cp | Multiple values Only for Gas properties set to `User specified` and Gas model set to `Real gas`
Geometry inputs
Hub inlet diameter |
Stacking | [Radial | Beta from Tan | Beta from Sin]
Hub vane inlet angle | Only for Stacking set to `Beta from Tan` or `Beta from Sin`
Hub vane normal thickness |
Shroud diameter calc | [Diameter | Vane inlet angle | Optimise diameter]
Shroud inlet diameter | Only for Shroud diameter calc set to `Diameter`
Shroud vane inlet angle | Only for Shroud diameter calc set to `Vane inlet angle`
Shroud vane normal thickness |
Leading edge location on shroud %M |
Leading edge normal to hub | [Select | Clear]
Leading edge inclination to radial | Only for Leading edge normal to hub cleared
Diffuser type | [Vaned | Vaneless]
Impeller type | [Unshrouded | Shrouded]
Axial tip clearance | [Tip clearance/vane height | Tip clearance]
Tip clearance ratio | Only for Axial tip clearance set to `Tip clearance/vane height`
Tip clearance | Only for Axial tip clearance set to `Tip clearance`
Axial length ratio calc | [Automatic | User specified]
Axial length ratio | Only for Impeller length ratio set to `User specified`
Main vanes |
Intervanes |
Backsweep angle |
Rake angle |
Axial length ratio |
Surface roughness | [Machined | Cast]

For details on result parameters, see Viewing the Results.

The data defining the case are also displayed in the first three tabs of the user interface as follows:

- Duty and Aerodynamic Data Tab
- Gas Properties Tab
- Geometry Tab

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