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by Bonnie.Jonkman
Thu Aug 06, 2009 5:18 pm
Forum: Computer-Aided Engineering Software Tools
Topic: binary .wnd specification
Replies: 5
Views: 3681

Hi Stefan,

I'm glad you got it working. Thanks for posting the code!
by Bonnie.Jonkman
Tue Aug 04, 2009 12:11 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Wind Data file called 90m_12mps for 5MW turbine example
Replies: 6
Views: 6161

Hi, The error in GetHHWind was generated when AeroDyn couldn't read the the hub-height wind file correctly. It tried to read 8 columns of numeric data, but encountered text or some other invalid characters. The first thing I'd check is that all of your comment lines start with "!". The fil...
by Bonnie.Jonkman
Tue Aug 04, 2009 11:30 am
Forum: Computer-Aided Engineering Software Tools
Topic: TurbSim Test Error
Replies: 2
Views: 1647

Hi, The scripts that read the TurbSim data were created using newer versions of Matlab than you are using. The textscan function in older versions works differently than the current version, and that seems to be causing the error you are getting. You can look at the MathWorks documentation for more ...
by Bonnie.Jonkman
Fri Jul 10, 2009 12:09 pm
Forum: Computer-Aided Engineering Software Tools
Topic: binary .wnd specification
Replies: 5
Views: 3681

Stefan, I have some Fortran code that can be used to create the .wnd files (and the .sum files that AeroDyn needs to read and scale the .wnd files). I put it on the website with the Matlab code. If you get a working Matlab script that creates the files (and you don't mind sharing with others), I wou...
by Bonnie.Jonkman
Wed Jul 08, 2009 9:49 am
Forum: Computer-Aided Engineering Software Tools
Topic: binary .wnd specification
Replies: 5
Views: 3681

Hi Stefan, I have a Matlab function that reads TurbSim's FF Bladed-style .wnd files (and associated .sum files). You can download it in the zip file at http://wind.nrel.gov/public/bjonkman/ . The file name is readBLgrid.m . Let me know if you need the text description as well. I have a description f...
by Bonnie.Jonkman
Mon Jul 06, 2009 4:27 pm
Forum: Computer-Aided Engineering Software Tools
Topic: IEC Wind
Replies: 1
Views: 3820

Hi Teddy, I'm not exactly sure I understand your question, but hopefully this will help. The IECWind program ( http://wind.nrel.gov/designcodes/preprocessors/iecwind/ ) creates the deterministic wind fields for the Extreme operating gust (EOG), Extreme direction change (EDC), Extreme coherent gust w...
by Bonnie.Jonkman
Mon Jul 06, 2009 1:21 pm
Forum: Inflow Turbulence
Topic: NREL 5MW Turbulent Grid Spacing
Replies: 5
Views: 10437

Scott.Larwood wrote: do you know of any studies on appropriate grid spacing? If not I think this would make for a useful research project.


This very project has been on my list for some time. Unfortunately, I haven't yet had the time to do it.
by Bonnie.Jonkman
Mon Jul 06, 2009 1:09 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Compiling Turbsim
Replies: 8
Views: 4720

Adam,

I know of a few people who have compiled TurbSim under Linux, but I think most of them use g95. As Marshall indicated, the SysVF.f90 file will have to be changed for the compiler you use. Unfortunately, I do not have source code for compilers other than VF.


Bonnie
by Bonnie.Jonkman
Fri Jun 19, 2009 10:13 am
Forum: Inflow Turbulence
Topic: NREL 5MW Turbulent Grid Spacing
Replies: 5
Views: 10437

Hi, We have been using 31x31 grids for the 5 MW model, which gives us a little better than 5-m resolution. The files are large (72 MB), but the 5 MW turbine is a large machine. Due to hardware memory requirements in the past, we've had to generate these files on a 64-bit Windows server, but I've rec...
by Bonnie.Jonkman
Thu Oct 23, 2008 11:59 am
Forum: Inflow Turbulence
Topic: TurbSim & Design Codes Update Workshops
Replies: 4
Views: 16844

Workshop Presentations Available

PDFs of the presentations from the TurbSim Workshop last month are located here: http://wind.nrel.gov/public/Kelley/TurbSim%20Workshop/WorkshopDocuments/ The presentations from the Design Codes Workshop are located here: http://wind.nrel.gov/public/Kelley/TurbSim%20Workshop/WorkshopDocuments/DesignC...
by Bonnie.Jonkman
Tue Sep 30, 2008 11:17 am
Forum: Inflow Turbulence
Topic: TurbSim v1.40 available
Replies: 0
Views: 6465

TurbSim v1.40 available

Hello Design Codes Users, TurbSim version 1.40 has been uploaded to the NWTC Design Codes web site. Version 1.40 includes some changes to the summary file and to calculations of parameters in all the non-IEC spectral models. The calculations in the IEC models have not changed, nor are there any chan...
by Bonnie.Jonkman
Thu Sep 04, 2008 12:00 pm
Forum: Inflow Turbulence
Topic: TurbSim & Design Codes Update Workshops
Replies: 4
Views: 16844

Dear Wind Turbine Modeling Enthusiasts, Thank you to all who have already registered for the upcoming TurbSim and Design Codes Workshops. For those of you who are planning to attend but have not yet registered, please remember to send your completed registration form to Bonnie Jonkman by Friday, Sep...
by Bonnie.Jonkman
Tue Aug 19, 2008 6:30 pm
Forum: Inflow Turbulence
Topic: TurbSim & Design Codes Update Workshops
Replies: 4
Views: 16844

Registration for the TurbSim and Design Codes Workshops

Dear Wind Turbine Modeling Enthusiasts, We have been making further plans for the TurbSim and Design Codes Workshops to be held at the National Wind Technology Center September 22-25, 2008. If you are planning to attend, please complete the registration form and return it to Bonnie Jonkman by Septem...
by Bonnie.Jonkman
Fri Aug 15, 2008 10:56 am
Forum: Inflow Turbulence
Topic: TurbSim & Design Codes Update Workshops
Replies: 4
Views: 16844

Further details (including a registration form) regarding the upcoming TurbSim and Design Codes Workshops at the NWTC will be sent out next week.

Stay tuned....
by Bonnie.Jonkman
Tue Jul 15, 2008 9:27 am
Forum: Inflow Turbulence
Topic: Turbsim IECturbc Parameter
Replies: 2
Views: 7163

When you specify a turbulence intensity (I) in TurbSim's IECturbc parameter, the standard deviation is calculated by sigma_1 = V_hub*I/100.

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