Boundary conditions for Hovering Rotor

Kamranh01 · March 12, 2023, 16:15

Hi guys I managed to finally get my simulation to run with the euler solver

I wanted to ask about the boundary conditions I have set up. My study is basically analyzing the performance of a rotor system of a medium-scale UAV in SU2 using periodic boundary conditions at different altitudes on Earth. The Rotor is simplified by being in hover conditions, meaning no forward flight modeling is necessary. The rotor is just the 3D aerofoil submerged within a section of cylindrical farfield.

1) if the rotor is in hover, does that mean the freestream mach must be equal to zero since the rotor is taken at hover?

2) My boundary conditions in SU2 are as follows

Pressure inlet- set to 101325Pa (atmospheric pressure) with zero directional unit vector as its still air

Pressure Outlet- set to 101325Pa (atmospheric pressure)

Periodic markers at the two sides

Far-field marker for the edge of the cylinder

is this correct? or should the inlet and outlet have different pressures? If so how would I go about calculating the pressure at the outlet?

I think that is all for now

Bakhshi · November 14, 2023, 05:02

Hello

Hope you are doing well

I wanted to know if you were able to figure out correct boundary conditions for hovering rotor. I am currently trying to simulate a similar rotor hover problem and facing some convergence issue.

Thank for the help.

March 12, 2023, 16:15	Boundary conditions for Hovering Rotor	#1
Kamranh01 New Member Kamran Join Date: Feb 2023 Posts: 10 Rep Power: 3	Hi guys I managed to finally get my simulation to run with the euler solver I wanted to ask about the boundary conditions I have set up. My study is basically analyzing the performance of a rotor system of a medium-scale UAV in SU2 using periodic boundary conditions at different altitudes on Earth. The Rotor is simplified by being in hover conditions, meaning no forward flight modeling is necessary. The rotor is just the 3D aerofoil submerged within a section of cylindrical farfield. 1) if the rotor is in hover, does that mean the freestream mach must be equal to zero since the rotor is taken at hover? 2) My boundary conditions in SU2 are as follows Pressure inlet- set to 101325Pa (atmospheric pressure) with zero directional unit vector as its still air Pressure Outlet- set to 101325Pa (atmospheric pressure) Periodic markers at the two sides Far-field marker for the edge of the cylinder is this correct? or should the inlet and outlet have different pressures? If so how would I go about calculating the pressure at the outlet? I think that is all for now

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November 14, 2023, 05:02		#2
Bakhshi New Member Bakhshi Mehul Join Date: Mar 2023 Posts: 5 Rep Power: 3	Hello Hope you are doing well I wanted to know if you were able to figure out correct boundary conditions for hovering rotor. I am currently trying to simulate a similar rotor hover problem and facing some convergence issue. Thank for the help.