OpenFAST - parsing data from InflowFile.dat

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Breen.Elliott
Posts: 13
Joined: Mon Nov 09, 2020 9:24 am
Organization: Trinity College Dublin
Location: Ireland

OpenFAST - parsing data from InflowFile.dat

Postby Breen.Elliott » Sat Jan 30, 2021 11:47 am

Hi All,

I have encountered an error while running the IEA 15MW Turbine on OpenFAST as detailed below and in the attached image. Also attached is a snippet from IEA-15-240-RWT_InflowFile.dat.

>> A fatal error occurred when parsing data from
"Desktop\OpenFAST\IEA-15-240-RWT_InflowFile.dat".
>> The variable "VFlowAng" was not found on line #7


Any help would be greatly be appreciated.

Kind regards,
Breen Elliott
Attachments
Inflow2.png
Inflow2.png (86.85 KiB) Viewed 398 times
Inflow.png
Inflow.png (65.25 KiB) Viewed 398 times

Jason.Jonkman
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Joined: Thu Nov 03, 2005 4:38 pm
Location: Boulder, CO
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Re: OpenFAST - parsing data from InflowFile.dat

Postby Jason.Jonkman » Mon Feb 01, 2021 8:46 am

Dear Breen,

It looks like you are running OpenFAST v2.5, but your InflowWind file is formatted for an earlier version. From the OpenFAST online documentation--see: https://openfast.readthedocs.io/en/mast ... hange.html, you'll see that VFlowAng was added to the InflowWind primary input file between OpenFAST v2.4 and OpenFAST v2.5.

Best regards,
Jason Jonkman, Ph.D.
Senior Engineer | National Wind Technology Center (NWTC)

National Renewable Energy Laboratory (NREL)
15013 Denver West Parkway | Golden, CO 80401
+1 (303) 384 – 7026 | Fax: +1 (303) 384 – 6901
nwtc.nrel.gov

Breen.Elliott
Posts: 13
Joined: Mon Nov 09, 2020 9:24 am
Organization: Trinity College Dublin
Location: Ireland

Re: OpenFAST - parsing data from InflowFile.dat

Postby Breen.Elliott » Wed Feb 03, 2021 6:00 am

Thanks for your help Jason!

Kind regards,
Breen

Raphael.Kinvi
Posts: 4
Joined: Mon Apr 26, 2021 12:36 am
Organization: TOTAL
Location: PARIS

Re: OpenFAST - parsing data from InflowFile.dat

Postby Raphael.Kinvi » Mon Apr 26, 2021 3:59 pm

Hello Everyone,
I have encountered the same error while running the 15MWatt_dev/IEA-15-240-RWT model with Openfast 2.5.0.

>> A fatal error occurred when parsing data from
"Desktop\OpenFAST\IEA-15-240-RWT_InflowFile.dat".
>> The variable "VFlowAng" was not found on line #7

So I replaced the line #7 in the InflowFile.dat by "0 VFlowAng - Upflow angle (degrees) (not used for native Bladed format
WindType=7)" accoring to the documentation.

Now, I have encountered another error in line 8. Below is the error message?
Am I missing something, please? Please can I find a properly formated file already compatible with my version of Openfast for a test?
Thank you very much


*******************************************************
OpenFAST input file heading:
IEA 15 MW offshore reference model monopile configuration

Running ElastoDyn.
Nodal outputs section of ElastoDyn input file not found or improperly formatted.
Running AeroDyn.
Nodal output section of AeroDyn input file not found or improperly formatted.
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. (node 1, blade 1)
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. (node 2, blade 1)
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. (node 1, blade 2)
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. (node 2, blade 2)
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. (node 1, blade 3)
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. (node 2, blade 3)
Running InflowWind.

FAST_InitializeAll:InflowWind_Init:InflowWind_ParseInputFileInfo:ParseInVar:
>> A fatal error occurred when parsing data from
"C:/Users/rapho/WORKSTATION/15MWatt_dev/IEA-15-240-RWT/OpenFAST/IEA-15-240-RWT-Monopile/../IEA-15
-240-RWT/IEA-15-240-RWT_InflowFile.dat".
>> The variable "NWindVel" was not found on line #8.

FAST encountered an error during module initialization.
Simulation error level: FATAL ERROR

Aborting OpenFAST.
*****************************************************************

Jason.Jonkman
Posts: 5771
Joined: Thu Nov 03, 2005 4:38 pm
Location: Boulder, CO
Contact:

Re: OpenFAST - parsing data from InflowFile.dat

Postby Jason.Jonkman » Mon Apr 26, 2021 5:09 pm

Dear Raphael,

You shouldn't replace line #7, but add VFlowAng to line #7, shifting NWindVel to line #8 (likewise shifting all other lines down by one). An example of the an InflowWind input file for OpenFAST v2.5 is available in the corresponding r-test: https://github.com/OpenFAST/r-test/blob ... _12mps.dat.

Best regards,
Jason Jonkman, Ph.D.
Senior Engineer | National Wind Technology Center (NWTC)

National Renewable Energy Laboratory (NREL)
15013 Denver West Parkway | Golden, CO 80401
+1 (303) 384 – 7026 | Fax: +1 (303) 384 – 6901
nwtc.nrel.gov


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