Boundary Condition for Helicopter Hover

ChopraAbhi · July 27, 2020, 06:16

Hi all,

I am runing a simulation oh helicopter in Hover with actuator line model and I am trying to understand the BC that needs to be imposed.
1. Inlet -> Vx = Vy = Vz = 0 m/s?
2. Pressure Oulet -> P = 0
3. Side walls -> traction free with zero normal

I have calculated induced velocity from disk loading (given) and using this as well as the tangential velocity from omega*r/R calculating body force terms. Doesn't the body force term suppose to create a flow near the blade region or am I missing something?

ChopraAbhi · July 29, 2020, 01:59

Hi all,
I changed my BCs to follows:
All six faces (including inlet and outlet) traction-free and zero normal velocity. Still I am having no success. I would like to understand fundamentally what am I missing.

July 27, 2020, 06:16	Boundary Condition for Helicopter Hover	#1
ChopraAbhi New Member Abhi Chopra Join Date: Jun 2020 Posts: 6 Rep Power: 6	Hi all, I am runing a simulation oh helicopter in Hover with actuator line model and I am trying to understand the BC that needs to be imposed. 1. Inlet -> Vx = Vy = Vz = 0 m/s? 2. Pressure Oulet -> P = 0 3. Side walls -> traction free with zero normal I have calculated induced velocity from disk loading (given) and using this as well as the tangential velocity from omega*r/R calculating body force terms. Doesn't the body force term suppose to create a flow near the blade region or am I missing something?

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July 29, 2020, 01:59		#2
ChopraAbhi New Member Abhi Chopra Join Date: Jun 2020 Posts: 6 Rep Power: 6	Hi all, I changed my BCs to follows: All six faces (including inlet and outlet) traction-free and zero normal velocity. Still I am having no success. I would like to understand fundamentally what am I missing.