6 Improving the wing root

A fillet is added between the fuselage and the wing, as shown in the image below. This can be made with the addition of fairings on the wing root. An igs file for this design, called wings-fairings.igs can be found in the folder provided before, in the "Fairings" sub-folder.
 

 

Let's add this new design to our geometry library:

1. Click on the 'Geometries' tab.
2. Select the "Reference" geometry. Then press ctrl-C on the keyboard, and finally ctrl-V. This will create a duplicate geometry.
3. Select the geometry "Reference-copy" that was created and click the edit button.

Now update this duplicate:

1. change the names to "Fairings".
2. Change the "Main parent" to the reference case.
3. Remove the wings part by clicking the delete button.
4. Click the "Add reference parts button and select the file "WINGS-FAIRINGS.igs" in the "Fairings" sub-directory.
5. Validate the form at the bottom with the OK button.

Create a configuration for this new geometry:

1. set a name, for example "zero-deflection"
2. leave all command angles to zero.
3. At the bottom, click the "Create" button.

Create an analysis for this new geometry, proceeding the same way as for the reference geometry but selecting the "Fairings" geometry. We can call this analysis "Fairings" as well.
 

Once the runs have been processed, we can add a new curve to the chart. Here is the result that should be obtained:
 

 

From the plots it seems the problem has been corrected, the stall behavior is now normal and happens at approximately 15° of angle of attack. This can be confirmed visually:

1. Go to the "Visualisations" tab
2. Set 2 side-by-side frames.
3. Set the projects filter to 3D projects.
4. Set the first project to the Reference case at 12° of angle of attack.
5. Set the second case to the Fairings case at 12° of angle of attack.

You should be able to obtain something similar to the following visualisation, where we can see the separation does not occur anymore with the fairings: