### 5.1.3. Analysis (Throughflow) Calculation

Optionally, before creating a BladeGen or BladeEditor model, an analysis calculation may be performed. This uses a similar throughflow method to the design calculation but simply analyses the design created in the previous step, rather than adjusting the geometry. A significant difference between the design and analysis results indicates a potentially flawed design.

To set up an analysis (throughflow) case in Vista AFD:

1. Set up and run a design (throughflow) case.

2. Either edit the Analysis cell (of the new Vista AFD system) or show that cell's properties.

   (Right-click the Analysis cell and select either Edit or Properties from the shortcut menu.)

   Editing the cell causes the Vista Axial Fan Design dialog box to appear; the first tab of this dialog box contains the input data and the last tab displays the results.

   The cell properties can be used as an alternative to the aforementioned two tabs that accept input. One advantage of using cell properties is that you can make use of ANSYS Workbench input parameters to specify the values of input settings.

3. Specify the required input settings. Refer to Data Review and Edit for details about each input setting.

4. Run an analysis (throughflow) calculation (which is more detailed than the design (throughflow) calculation) by one of these methods:

   - Updating the Analysis cell after configuring its properties.

   - Editing the Analysis cell, configuring the settings in the Controls tab, then clicking the Calculate button, which is shown in Figure 5.5: Analysis Results Summary.

     Figure 5.5: Analysis Results Summary

     The Results tab is then automatically made visible. The parameters shown on the Results tab for an analysis calculation should be very similar to those for a design calculation, with the exception of the deviation, which is limited to 20 degrees in the design calculation only. Should the results be significantly different between the design and analysis calculations, this indicates a potentially flawed design and the input data should be reviewed carefully.

     A sketch of the meridional view of the designed fan appears in the sketch window. This outlines the annulus in black, the IGV in red (if enabled), the rotor in blue and the OGV in green (if enabled).

     Refer to Results Tab for details.

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