Hello guys, thanks for helping!
To make it easy for you to understand how I did it, was this. I created a C-type domain, with the aerodynamic profile with the leading edge aligned at the XY origin, the chord length is 0.575 m. So I created a circle with the center halfway down the chord length 0.2875m.
Then I made the mesh and such, and in FLUENT, I set the rotation as follows in the image below.
So, by logic, I thought. Well if I set a time step of 0.005s in 400 time steps, I'll have a 2s flow. As I set 0.2875 rad / s in 2s, my domain will have turned 33 °. So I tried to correlate the flow time with the angles by imagining that the FLUENT would rotate it in a regular way over the time steps. However, I would only be interested in the range between 0 ° and 20 ° so in the time step coinciding with 20 ° I plotted a graph as below.
The red curve has the result from the simulation in the FLUENT to the given Reynolds number and the blue curve from an analysis in the XFLR5 software to the same Reynolds value. The problem is that the simulation in FLUENT changes so we can see stolen angle, as far as I can imagine, or because the correlation of flow time with the angle is wrong or properly due to coarse mesh.
I decided to try to simulate this way, because when I impose the angle of attack through the velocity components and use a fixed mesh, the values are not satisfactory, the values do not assume as the XFLR5 or an experimental date for that airfoil. The best I could do was this, however as you see this graph in my opinion is not acceptable because it moved the stall angle compared to the XLFR5.
I believe the biggest problem to simulate this type of profile, in the case the S1223, because it is not a symmetric profile so I do not even know if there is possibility to create a structured mesh for it. I find on the internet several tutorials, but they use only symmetric profiles (which is very easy, right?), I'm trying because I need this for my SAE Aerodesign team, and I want to share with everyone here in the community and abroad, because there are no tutorials for non-symmetric profiles.
I simulated again this time setting to 0.1745 rad / s which in 2s would give me 20 °. I have not worked on the results yet, I will do this and share it with you. Now that I have exploded more visibly how I did the simulation, can you give me any more ideas?
Thanks for opportunity, attetion, and helping!