[Naveen Kumar Gulla]

Hi everyone,

I'm trying to simulate the propeller blade in fluent using MRF. Basically, I'm trying to get a similar result with the experimental data, to get the thrust and torque. However, the torque that I'm getting is a way too much different than the experimental value. I'm not sure what could have gone wrong.

I'll start with explaining the method that I'm using. After some search and reading in the forum, I found that to study a propeller blade, it needs to be segregated into three different sections, the front zone for translation velocity, a rotating zone that contains the propeller blade, and the downstream outlet section. I'm using k-eps model.
The figure below shows the setup that I'm currently using for my analysis, Kindly please advice me if there is anything wrong.

[Naveen Kumar Gulla]

Some more images

[Naveen Kumar Gulla]

some more images

[kiran]

please refer to the fluent tutorials, there are plenty of examples also available online.

[Naveen Kumar Gulla]

Originally Posted by kiran

please refer to the fluent tutorials, there are plenty of examples also available online.

I have seen most of the videos, but no one has cared about results. They have shown only the procedure

Thank you for your reply kiran

[Kushal Puri]

Originally Posted by Naveen Kumar Gulla

I have seen most of the videos, but no one has cared about results. They have shown only the procedure

Thank you for your reply kiran

I am nowhere seeing the RPM given in the BCs.

[Naveen Kumar Gulla]

Originally Posted by Kushal Puri

I am nowhere seeing the RPM given in the BCs.

I have given to sta_dom

[Kushal Puri]

Originally Posted by Naveen Kumar Gulla

I have given to sta_dom

But it has to be given to rotary domain right ?

[Naveen Kumar Gulla]

Originally Posted by Kushal Puri

But it has to be given to rotary domain right ?

I have watched few tutorials from learncax and also viewed in Fluent help that when we are using SRF approach we can give motion to the fluid domain instead of rotor.

Thank you

[vasava]

Originally Posted by Naveen Kumar Gulla

...when we are using SRF approach we can give motion to the fluid domain instead of rotor.

You are using MRF and not SRF. Thus, you have to give the rotating condition accordingly.

Your setup seems ok except that you have set your stationary part as rotating and rotating part as stationary. This is already pointed out by Kushal.

The aim of most tutorials is to demonstrate how a certain scenario can be simulated with fluent. All the official Ansys tutorial discuss results and some verification methods briefly. Of course you yourself will have to figure out how you post-process your case to get relevant results. No tutorial will do it for you.

I recommend that you go through the rotating machinery training material from Ansys. It has some very good tutorials and theory explanations about frame of reference usage. Here is the link.