Learning Forum

[HamieH]

Hello Everyone.

I'm doing some experimenting to improve my understanding of fluent. I'm trying to run a simulation of a propeller that will be on a quadcopter drone using Ansys Fluent. I hope to obtain thrust force, airspeed, Kt etc.

My issue is I'm a little lost on how to set this up, I have been following many tutorials online so I have my meshing complete, I have a rotating domain and a larger static domain encompassing the propeller. Setting up fluent is where I encounter some issues, I am unsure if I am supposed to use a steady-state or transient simulation to obtain values. I enter in an RPM and set up the simulation to record force values but the forces are very small, I'm expecting somewhere in the 30N range but it is nowhere near that. I see some tutorials enter in an inlet and outlet airspeed but i don't have such values to me. I wish to gain these parameters given the propeller's rotation speed in normal air at SATP conditions.

If anyone has any experience in this and would be willing to give me some insight id really appreciate it I wanna get better and learn from this.

[Karthik Remella]

Hello If you are using the 'Mesh Motion' approach, I'd run the problem as a transient simulation. That would be the correct way to simulate the physics.
Regarding your force monitor, which forces are you attempting to capture? What is your freestream velocity?
Karthik

[HamieH]

Hi thanks for the response. The force I am trying to capture is the thrust produced. I wanted to simulate the propeller as if it were to be hovering stationary and see the thrust produced at varying RPM, I put my inlet velocity as 0. Was I correct in doing so or would I need to input a freestream velocity and if so what would be a good velocity to input ?

Thank you for your help

[Al_Psi]

I am trying to do something similar for a quadcopter. Can u help me with the boundary conditions for hovering copter with no inlet velocity.
Regards

[Aslam SAIFI]

i

[Aslam SAIFI]

I am doing cfd on the propeller.

I have some question if any one can help me on these.

1. In the above uploaded picture, i have to rotate my propeller 6000 rpm in clockwise direction about x axis if looked from top view ( from psitive z axis) , so what value shoud i have to enter, positive 6000 or negative 6000.