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Wind turbine benchmark exercise on mechanic loads: A state of the art report. Volume 1 (Part A): Main body of the report

Technical Report:

Abstract

In order to establish the maturity of existing computer codes, by means of which mechanical loads in main components of horizontal axis wind turbines can be determined, ECN initiated a benchmark exercise. Nine parties from six different nationalities participated. Calculations were performed on the WEG-MS1 wind turbine at Orkney (UK), and compared, where possible, with measurements. Three classes of calculation of increasing complexity were defined. Class I: stationary conditions and rigid structure; Class II: normal operating conditions with four measuring campaigns; Class III: transient condition with two measuring campaigns. The results, internal rotor blade loads and loads acting on the nacelle (binned values, standard deviations, maximum and minimum values, spectral densities) are discussed and analysed, thereby taken into account the underlying models. Applied aerodynamic and structural modelling have therefore been surveyed. Much attention has also been paid to comprehend the calculated numerical results, viz. shapes and trends. The summarized conclusion is that sufficient knowledge is available to develop and implement so-called first generation rotor computer codes for engineering applications. With these codes, of which the aero-elastic rotor model is the backbone, loads in many components of wind turbines can be calculated, with sufficient technical accuracy (about 20 to 35%) provided  More>>
Authors:
Van Grol, H J; Snel, H; Schepers, J G [1] 
  1. Netherlands Energy Research Foundation, Petten (Netherlands)
Publication Date:
Jan 01, 1991
Product Type:
Technical Report
Report Number:
ECN-C-91-030
Reference Number:
SCA: 170602; 990200; PA: ECN-91.0635; SN: 91000585454
Resource Relation:
Other Information: PBD: Jan 1991
Subject:
17 WIND ENERGY; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; HORIZONTAL AXIS TURBINES; DYNAMIC LOADS; ROTORS; PERFORMANCE TESTING; COMPUTER CODES; ACCURACY; DESIGN; RELIABILITY; COMPUTER CALCULATIONS; EXPERIMENTAL DATA; COMPARATIVE EVALUATIONS; AERODYNAMICS; THEORETICAL DATA; BENCHMARKS; UNITED KINGDOM; STRUCTURAL MODELS; MATHEMATICAL MODELS; NUMERICAL DATA; 170602; 990200; TURBINE DESIGN AND OPERATION; MATHEMATICS AND COMPUTERS
OSTI ID:
10103858
Research Organizations:
Netherlands Energy Research Foundation (ECN), Petten (Netherlands)
Country of Origin:
Netherlands
Language:
English
Other Identifying Numbers:
Other: ON: DE92721401; CNN: Contract EC EN3 W/C1/151/NL; Contract NOVEM 18.73-086.10; TRN: 91.0635
Availability:
OSTI; NTIS (US Sales Only)
Submitting Site:
ECN
Size:
122 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Van Grol, H J, Snel, H, and Schepers, J G. Wind turbine benchmark exercise on mechanic loads: A state of the art report. Volume 1 (Part A): Main body of the report. Netherlands: N. p., 1991. Web.
Van Grol, H J, Snel, H, & Schepers, J G. Wind turbine benchmark exercise on mechanic loads: A state of the art report. Volume 1 (Part A): Main body of the report. Netherlands.
Van Grol, H J, Snel, H, and Schepers, J G. 1991. "Wind turbine benchmark exercise on mechanic loads: A state of the art report. Volume 1 (Part A): Main body of the report." Netherlands.
@misc{etde_10103858,
title = {Wind turbine benchmark exercise on mechanic loads: A state of the art report. Volume 1 (Part A): Main body of the report}
author = {Van Grol, H J, Snel, H, and Schepers, J G}
abstractNote = {In order to establish the maturity of existing computer codes, by means of which mechanical loads in main components of horizontal axis wind turbines can be determined, ECN initiated a benchmark exercise. Nine parties from six different nationalities participated. Calculations were performed on the WEG-MS1 wind turbine at Orkney (UK), and compared, where possible, with measurements. Three classes of calculation of increasing complexity were defined. Class I: stationary conditions and rigid structure; Class II: normal operating conditions with four measuring campaigns; Class III: transient condition with two measuring campaigns. The results, internal rotor blade loads and loads acting on the nacelle (binned values, standard deviations, maximum and minimum values, spectral densities) are discussed and analysed, thereby taken into account the underlying models. Applied aerodynamic and structural modelling have therefore been surveyed. Much attention has also been paid to comprehend the calculated numerical results, viz. shapes and trends. The summarized conclusion is that sufficient knowledge is available to develop and implement so-called first generation rotor computer codes for engineering applications. With these codes, of which the aero-elastic rotor model is the backbone, loads in many components of wind turbines can be calculated, with sufficient technical accuracy (about 20 to 35%) provided that the structure is relatively rigid and assuming that the wind turbine is neither yaw nor stall controlled. 11 figs., 9 tabs., 22 refs.}
place = {Netherlands}
year = {1991}
month = {Jan}
}