petebachant / ntnu-hawt-turbinesfoam Goto Github PK

The experimental results are in blue from Krogstad and Adaramola (2012) "Performance and near wake measurements of a model horizontal axis wind turbine". The numerical results I obtained are in green.

I ran the single turbine case without any changes and was not able to reproduce the experimental results. I also tried refining the mesh later, but it has no influence in this TSR shift. Am I missing something I should be setting before replicating this?

According to Pierella et al. (2012) this was set to:

Should be done for both RANS and LES.

ddtSchemes should probably be backward.

I tried to run the case but I got this Error in pimpleFoam log file. what could be the reason?

((` Creating finite volume options from "system/fvOptions"

Selecting finite volume options model type axialFlowTurbineALSource
Source: turbine1
- selecting cells using cellSet turbine1

--> FOAM FATAL ERROR:
Cannot find directory "polyMesh/sets" in times 0 down to constant

From function Time::findInstance(const fileName&, const word&, const IOobject::readOption, const word&)
in file db/Time/findInstance.C at line 142.

FOAM exiting `))
I have changed the Debug switches in controlDict . does it have any effects on this issu?

Looks like since they've been offset, the blade roots of the upstream turbine are exposed and creating vortices. May need to extend the cylindrical part inward towards the axis a bit.

Also adjust wake sampling and loading accordingly. See https://github.com/petebachant/UNH-RVAT-turbinesFoam.

The table in Pierella et al. (2012) seems to be incorrect in that the max radius does not correspond to the rotor radius.

Keep steps per rev constant when running, e.g., performance curves.

Perform simulation with turbines deactivated. Must finish #1 first.

Should be able to specify behind which turbine. Quantities should be the mean streamwise velocity and the streamwise velocity variance normalized by U_infty**2.

Merge Allrun and paramsweep.py. Similar to https://github.com/UNH-CORE/RM2-CACTUS. Should be able to run parameter sweeps, turn on/off turbines, VGs, set TSRs, etc.

Hi,
AFAIK, nuSgs is no longer used for LES, instead nut is used for both, starting from a certain version of OF. Can anyone confirm that?
https://www.cfd-online.com/Forums/openfoam/200655-about-nut-nusgs.html

For downstream turbine.

From turbinesFoam/turbinesFoam#297 cc @chandukec

• wake -- needs sampling
• spanwise -- file names not formed correctly
• Remove strut-perf -- only relevant to RM2
• recovery -- might want to remove that since it may not be relevant here

Probably happened when switching over to a single run script, and focusing on sampling nacelle values. Basically we need to do similar plotting at https://github.com/petebachant/UNH-RVAT-turbinesFoam.

I've searched but could not find the blade geometry and pitching vs free stream velocity data for the NTNU turbine. Can you please share the source, if possible?

From Pierella et al. (2012):

the turbulence intensity has been measured to be 0.3%.