Turning off Unsteady Aerodynamics because UA parameters are not included in airfoil

Wind & Water Structural Analysis
1

Dear Jonkman
When I use OpenFAST for simulation, I encounter the following error. How can I solve the error of UA parameter?
Currently, I am trying to export the angle of attack lift and other parameters of blade nodes, but it seems that all the output results are zero.

OpenFAST input file heading:
FAST Certification Test #18: NREL 5.0 MW Baseline Wind Turbine (Onshore)

Running ElastoDyn.
Nodal outputs section of ElastoDyn input file not found or improperly formatted.
Running AeroDyn.
AD15 Nodal Outputs: Nodal output section of AeroDyn input file not found or improperly formatted.
Skipping nodal outputs.
Warning: Turning off Unsteady Aerodynamics because UA parameters are not included in airfoil
(airfoil has likely has constant polars). (node 1, blade 1)
Warning: Turning off Unsteady Aerodynamics because UA parameters are not included in airfoil
(airfoil has likely has constant polars). (node 2, blade 1)
Warning: Turning off Unsteady Aerodynamics because UA parameters are not included in airfoil
(airfoil has likely has constant polars). (node 3, blade 1)
Warning: Turning off Unsteady Aerodynamics because UA parameters are not included in airfoil
(airfoil has likely has constant polars). (node 4, blade 1)
Warning: Turning off Unsteady Aerodynamics because UA parameters are not included in airfoil
(airfoil has likely has constant polars). (node 1, blade 2)
Warning: Turning off Unsteady Aerodynamics because UA parameters are not included in airfoil
(airfoil has likely has constant polars). (node 2, blade 2)
Warning: Turning off Unsteady Aerodynamics because UA parameters are not included in airfoil
(airfoil has likely has constant polars). (node 3, blade 2)
Warning: Turning off Unsteady Aerodynamics because UA parameters are not included in airfoil
(airfoil has likely has constant polars). (node 4, blade 2)
Warning: Turning off Unsteady Aerodynamics because UA parameters are not included in airfoil
(airfoil has likely has constant polars). (node 1, blade 3)
Warning: Turning off Unsteady Aerodynamics because UA parameters are not included in airfoil
(airfoil has likely has constant polars). (node 2, blade 3)
Warning: Turning off Unsteady Aerodynamics because UA parameters are not included in airfoil

2

Dear @Xiang.Wang,

You have only shared warnings, not errors that will stop a simulation. These are standard warnings for cylindrical airfoil sections that have constant drag and no lift for all angles of attack.

I’m not sure what you mean when you refer to “all the output results are zero”.

Best regards,