I am trying to follow the instructions in 126.96.36.199. AeroDyn Driver — OpenFAST v3.5.0 documentation to run the standalone AeroDyn driver in order to run some Dynamic BEMT analysis on the loads on a tidal turbine during braking (i.e. when the rotor speed is rapidly changing).
- My first question is whether I need to use the standalone AeroDyn module, or whether I could capture the dynamic effects of changing rotor speed using OpenFAST?
I have tried to run the example AeroDyn driver input file given at the bottom of 188.8.131.52. AeroDyn Driver — OpenFAST v3.5.0 documentation (I wanted to get this working before I go on to try using AnalysisType 2 for dynamic time-dependent analysis. When I do so, however, I get the following error:
“Dvr_ReadInputFile:Invalid numerical input for file “AeroDyn_driver_input.dvr” occurred while trying to
I have checked and the file format is exactly as shown in 184.108.40.206. AeroDyn Driver — OpenFAST v3.5.0 documentation.
- My second question therefore is: has anyone experienced a similar problem or is anyone able to advise where I might be going wrong?
I am sure it is not a straightforward file formatting issue but it may be something to do with the version of the AeroDyn Driver I am using and changes in file format requirements between versions? I have a compiled driver (AeroDyn_Driver_x64.exe) which I downloaded and installed using the instructions in https://www.nrel.gov/wind/nwtc/assets/pdfs/aerodyn-manual.pdf which now appear to be out of date as the download link (National Wind Technology Center's Information Portal | Wind Research | NREL) no longer works.
- My third question is therefore whether anyone could tell me where I can find and download the AeroDyn driver that corresponds with the instructions in 220.127.116.11. AeroDyn Driver — OpenFAST v3.5.0 documentation? I don’t have any experience of compiling drivers so it would be ideal if I could just download a compiled .exe file?
With all of these questions, it may just be that there is a way to run Dynamic BEMT modelling through AeroDyn with OpenFAST so that I can investigate the effect of rapidly changing rotor speed during braking. If so, any advice as to how to do so would also be gratefully received!
I hope that makes sense. Thank you very much for any help that the community are able to offer.