OpenVSP is a parametric aircraft geometry tool. It allows the user to quickly generate aircraft geometries. We will use it to generate the ONERA M6 wing. This is not a full blown tutorial, more a walk through. If you want to learn more about it, you can go to their tutorial videos
Navigate to the directory
overset/geo in your tutorial folder. Copy the file
profile_m6.dat from the
cp ../../../tutorial/overset/geo/profile_m6.dat .
Before we start, we should familiarize ourself with the geometry we are going to create. The real ONERA M6 experiment looked like this [O1]:
As we are not the first to simulate this wing, we can grab the geometry data and the airfoil from [O2]. Here is a short summary:
profile_M6 (this can also be found in the tutorial folder)
Leading Edge Sweep
If you open OpenVSP the first time, it should look like that:
Lets start the geometry generation:
Add a new Wing
A new Window
Wing: WingGeompops up
We notice a new geometry in the
Main View. This is the wing we just added. It also
shows up as
WingGeom in the
Geom Browser. To control the view, use
the following key- and mouse combinations:
Press the middle mouse button and move your mouse up and down.
Press the left mouse button and move your mouse.
Press the right mouse button and move you mouse.
Manipulate the wing geometry
Move your view, so you can take a look the whole wing. The first thing we notice, it is a ‘full’ wing, but we need only half of it. To change this, do the following:
Now we change the wing geometry. OpenVSP has no units, but we want to create the mesh in meters and thus choose our unit size to be one meter.
Change the values to the values listed in the table above
To make the meshing process easier, we will round the tip:
Tip Cap Type
Change the airfoil
Now, the wing geometry is as it should be, but we still have to change the airfoil:
Open the file
Click on the
right single arrowto select the Tip airfoil
repeat the process from
Export the geometry
Now we can export the geometry to read it into our meshing software. It might also be a good idea to save it first.
Untrimmed IGES (.igs)
Choose the proper unit. In this case it should be meter
OKand save it