### 5.1.2. Design (Throughflow) Calculation

If the results of the meanline calculation are satisfactory the design (throughflow) calculation may then be performed, if not the input data must be revised accordingly and the meanline calculation rerun.

To set up and run a design (throughflow) case in Vista AFD:

1. Set up and run a meanline case.

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

   (Right-click the Design 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 a design (throughflow) calculation (which is more detailed than the meanline calculation) by one of these methods:

   - Updating the Design cell after configuring its properties.

   - Editing the Design cell, configuring the settings in the Controls tab, then clicking the Calculate button, which is shown in Figure 5.4: Design Results Summary.

     Figure 5.4: Design Results Summary

     The Results tab is then automatically made visible. Compared to the meanline calculation, more detailed aerodynamic dependent parameters are computed; these are displayed numerically using the design calculation; again values that are outside of the recommended ranges are highlighted.

     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.

If the results of the design calculation are satisfactory then a BladeGen or BladeEditor model may be created. If they are not satisfactory then the input data must be revised accordingly and the process begins again with the meanline calculation (as shown in Figure 5.1: Principle of Operation Flowchart).

At this point, the geometry data is available for a Blade model to be created (see Creating a Blade Design). However, it may be useful to verify the performance of the design by running the throughflow calculation in analysis mode. See Analysis (Throughflow) Calculation for details.

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