A Wind-Turbine Performance Predictor
by Andrew Platt
National Wind Technology Center
WT_Perf uses blade-element momentum theory to predict the performance of
wind turbines. It is a descendent of the PROP code originally developed
by Oregon State University. Over the intervening years, many people from
many organizations put their marks on the code. More recently, the staff
at the NWTC rewrote the program, modernized it, and added new functionality
We have not created a theory manual explicitly for WT_Perf. However,
as WT_Perf is a descendent of the PROP code with minor theory changes and is
somewhat similar to AeroDyn, there are a few documents you might find
Applied Aerodynamics of Wind Power Machines
Robert E. Wilson
Peter B. S. Lissaman
Oregon State University
Small Wind Energy Conversion Systems (SWECS) Rotor Performance Model Comparison Study (UNPUBLISHED DRAFT)
An Investigation of WT_Perf Convergence Issues
David C. Maniaci
The Pennsylvania State University
AeroDyn Theory Manual
Pat J. Moriarty
A. Craig Hansen
A New Empirical Relationship between Thrust Coefficient and Induction Factor for the Turbulent Windmill State
Marshall L. Buhl Jr.
You may download the following files from our server:
- WT_Perf Change Log (3.05.00a-adp, 31 KB, 09-November-2012)
This is a list of changes made to the code. Look at this text
file to see if we've made worthwhile changes since you received your
previous version of the WT_Perf.
- WT_Perf User's Guide (3.05.00a-adp, 574 KB, 09-November-2012)
This is a brief guide that explains how to use WT_Perf. This includes information on what the options are within the input
file as well as some information on how the program works.
- WT_Perf Archive for Windows
( 3.0 MB)
(3.05.00a-adp, 3.0 MB, 13-November-2012)
This is a self-extracting archive of WT_Perf. Simply execute
it in an appropriate directory to extract the files. It contains
the change log, the source code, and some archive/web support files.
- WT_Perf Archive (tar.gz 2.5 MB)
(3.05.00a-adp, 2.5 MB, 13-November-2012)
This is a compressed archive of WT_Perf. It contains the same files as
WT_Perf Archive for Windows, but is stored in tar.gz format for non-Windows users.
- NWTC Subroutine Library
If you want to make changes to WT_Perf and/or recompile the code, you
will need to download the NWTC Subroutine Library v1.05.00 archive of general-use routines
You may download the following older files from our server:
If you want to refer to the WT_Perf in a report, here is a reference you can use:
NWTC Design Codes (WT_Perf by Andrew Platt).
http://wind.nrel.gov/designcodes/simulators/wtperf/. Last modified 26-November-2012; accessed 26-November-2012.
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