Boundary Condition for Helicopter Hover

ChopraAbhi · July 27, 2020, 05:16

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, 00:59

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, 05:16	Boundary Condition for Helicopter Hover	#1
ChopraAbhi New Member Abhi Chopra Join Date: Jun 2020 Posts: 6 Rep Power: 5	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?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
sliding mesh problem in CFX	Saima	CFX	46	September 11, 2021 07:38
Centrifugal fan	j0hnny	CFX	13	October 1, 2019 13:55
Basic Nozzle-Expander Design	karmavatar	CFX	20	March 20, 2016 08:44
Accessing multiple boundary patches from a custom boundary condition file	ripudaman	OpenFOAM Programming & Development	0	October 22, 2014 18:34
Radiation interface	hinca	CFX	15	January 26, 2014 17:11

July 29, 2020, 00:59		#2
ChopraAbhi New Member Abhi Chopra Join Date: Jun 2020 Posts: 6 Rep Power: 5	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.