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Modelling propeller slipstream with actuator disk |
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#1 |
New Member
Supakorn Suttiruang
Join Date: Mar 2020
Posts: 8
Rep Power: 6 ![]() |
Hi all,
I'm working on modeling propeller slipstream with the actuator disk model. OpenFOAM offers this in fvOptions and the tutorials include a turbine siting case. What I need is a velocity source from this disk which would flow over a lifting surface, simulating the wing-in-slipstream effect. I assumed that actuationDiskSource allows me to do this. However, the induced velocity from the propeller is a function of the propeller rotational speed, and there is no input parameter of actuationDiskSourcee related to the propeller rotational speed. So I'm not quite sure if this is possible in OpenFOAM. My question is: how do I model actuator disk as a propeller to create a slipstream source in OpenFOAM? |
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#2 | |
New Member
hirota tomohiro
Join Date: Jun 2021
Posts: 16
Rep Power: 5 ![]() |
Quote:
I'm facing the same problem. Did you solve the problem here? |
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#3 |
New Member
Supakorn Suttiruang
Join Date: Mar 2020
Posts: 8
Rep Power: 6 ![]() |
I have not solved the problem of propeller-as-actuator disk formulation in OpenFOAM. However, I have found several alternatives:
Cheers |
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#4 | |
New Member
hirota tomohiro
Join Date: Jun 2021
Posts: 16
Rep Power: 5 ![]() |
Quote:
I also did this method "Dynamic mesh (AMI) + RANS". I had the same impression as you. The computational cost is very high... It takes too much time... The MRF calculation for the propeller alone was successful for the time being, but I am still considering whether it will be effective for me as I have to do the calculation including the hull. I have never tried VLM, but I am very interested in it. Does this VLM require any rewriting of the code? In short, what are the steps to represent VLM? |
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#5 | |
New Member
Supakorn Suttiruang
Join Date: Mar 2020
Posts: 8
Rep Power: 6 ![]() |
Quote:
I would really appreciate it if you could share your MRF case. I could not get the solution to converge even for a very simple case and still wondering what I did wrong. The VLM route does not require any additional code writing. OpenVSP (open-source) comes with GUI which helps you model your vehicle including the propeller very effectively. There might be some learning curve in how to use the software but overall it is relatively easy to set up + much cheaper computationally compared to FVM. The geometry and solver setup are done within the same program. You can learn more from this wonderful presentation + demo of VSPAERO. Good luck |
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#6 | |
New Member
hirota tomohiro
Join Date: Jun 2021
Posts: 16
Rep Power: 5 ![]() |
Quote:
In my case, the propeller is placed inside the analysis region of a rectangular body, and the rotation of the propeller is taken into account in the MRF. In this case, the calculation converged and I was somewhat satisfied. However, now I have extended this case and the calculation is not converging. In this case, the propeller is mounted behind the hull, and the rotation of the propeller is taken into account in the MRF. The only difference between this case and the previous one is that the analysis area is extended and the hull is placed in front. I may have made a simple mistake, but the cause is unknown. If you want to know more details, please let me know. I'm a bit hesitant to start a new OpenVSP project, as the time left is very limited for me. |
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#7 | |
Member
Sachin
Join Date: Aug 2014
Location: India
Posts: 84
Rep Power: 12 ![]() |
Quote:
Were you able to solve the issue. If possible could you share your case set up with me Thanks Best regards Sachin |
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Tags |
propeller, propwash, slipstream |
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