Question on Running sharpy with atmospheric turbulence

[xxyao-95]

Hi,

I have generated atmospheric turbulence using Von-Karman turbulence model from a gaussian white noise input. I want to apply this turbulence to a sharpy simulation. I would like to ask that which sharpy setting is the best to use in this situation.

The atmospheric turbulence velocity file I generated is in the form of the following:

Time(s) delta_u(m/s) delta_v(m/s) delta_w(m/s)
0.01 12 13 14
.......

The simulation that I want to run is a time domain simulation with goland wing geometry. Here is the list of solvers that I am using:
ws2.config['SHARPy']['flow'] = [
'BeamLoader',
'AerogridLoader',
'StaticCoupled',
'DynamicCoupled',
'AerogridPlot',
'BeamPlot',
'SaveData'
]
I am using "NonLinearDynamicPrescribedStep" for structural solver and "StepUvlm" for aero solver.

I am a bit confused with which setting to use to apply the atmospheic turbulence generated into the simulation. I am looking at 3 possible settings and I am not sure which one is the most suitable:

The first is using gust_shape = 'time varying' in GustVelocityField setting and read from the file containing the velocities.
The second is using the "TurbVelocityField" setting.
The third is creating a .dyn.h5 file containing the velocity.

Could you let me know which one is the most appropriate?

[Arturo Muñoz-Simón (ArturoMS13)]

Dear xxyao-95,

In your case, the most suitable option is using gust_shape = 'time varying' (https://ic-sharpy.readthedocs.io/en/master/includes/generators/gustvelocityfield/time_varying.html). Include the route to your file in the file setting.

Just for the record, TurbVelocityField can be used if the wind has been generated with TurbSim (https://www.nrel.gov/wind/nwtc/turbsim.html) into a bts file. Moreover, the .dyn.h5 file is used to prescribe solid velocities or applied forces.

I hope this helps.

[xxyao-95]

Hi ArturoMS13

Thank you so much! I understand what to do now.