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Verification of design basis 2 - a coupled aeroelastic wind turbine model

Technical Report:

Abstract

A coupled aeroelastic horizontal axis wind turbine model has been developed, and the model has been implemented in an user-friendly computer package to run on a personal computer. The code is so far designed for modelling wind turbines in normal operation outside the stall region, and includes three categories of models. These are a load part (i.e. wind field description, gravity, centrifugal forces, Coriolis forces, and inertia forces due to elastic deformations), an aerodynamic part, and a structural dynamic part. The structural model comprises two degrees of freedom on each blade, one degree of freedom on both main shaft and generator, and four degrees of freedom related to the tower. The main characteristics of the model are briefly described, but the primary goal of the present report is to present example solution with the code that verify and demonstrate its usage. For that purpose measurements and simulations, related to both simple deterministic load cases and to more complex scenarios involving loads of both deterministic and stochastic character, have been compared. The simple load cases include loads from gravity- and centrifugal forces, and fully satisfactory predictions were obtained from the model. For the complex load cases three turbines, ranging in size  More>>
Publication Date:
Oct 01, 1994
Product Type:
Technical Report
Report Number:
RISO-R-730(EN)
Reference Number:
SCA: 170602; PA: DK-95:001032; EDB-95:020786; SN: 95001320372
Resource Relation:
Other Information: DN: EFP-92; PBD: Oct 1994
Subject:
17 WIND ENERGY; HORIZONTAL AXIS TURBINES; COMPUTERIZED SIMULATION; TURBINE BLADES; COMPUTER-AIDED DESIGN; AERODYNAMICS; COMPARATIVE EVALUATIONS; D CODES; DYNAMIC LOADS; ENERGY SPECTRA; ROTORS; STRUCTURAL MODELS; TURBULENCE; WIND LOADS; 170602; TURBINE DESIGN AND OPERATION
OSTI ID:
10110465
Research Organizations:
Risoe National Lab., Roskilde (Denmark). Test Station for Wind Turbines
Country of Origin:
Denmark
Language:
English
Other Identifying Numbers:
Other: ON: DE95737571; CNN: Contract ENS-1364/92-0005; ISBN 87-550-1956-0; TRN: DK9501032
Availability:
OSTI; NTIS; Also available from Risoe Library, P.O. Box 49, DK-4000 Roskilde, Denmark
Submitting Site:
DK
Size:
153 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Larsen, G C, and Soerensen, P. Verification of design basis 2 - a coupled aeroelastic wind turbine model. Denmark: N. p., 1994. Web.
Larsen, G C, & Soerensen, P. Verification of design basis 2 - a coupled aeroelastic wind turbine model. Denmark.
Larsen, G C, and Soerensen, P. 1994. "Verification of design basis 2 - a coupled aeroelastic wind turbine model." Denmark.
@misc{etde_10110465,
title = {Verification of design basis 2 - a coupled aeroelastic wind turbine model}
author = {Larsen, G C, and Soerensen, P}
abstractNote = {A coupled aeroelastic horizontal axis wind turbine model has been developed, and the model has been implemented in an user-friendly computer package to run on a personal computer. The code is so far designed for modelling wind turbines in normal operation outside the stall region, and includes three categories of models. These are a load part (i.e. wind field description, gravity, centrifugal forces, Coriolis forces, and inertia forces due to elastic deformations), an aerodynamic part, and a structural dynamic part. The structural model comprises two degrees of freedom on each blade, one degree of freedom on both main shaft and generator, and four degrees of freedom related to the tower. The main characteristics of the model are briefly described, but the primary goal of the present report is to present example solution with the code that verify and demonstrate its usage. For that purpose measurements and simulations, related to both simple deterministic load cases and to more complex scenarios involving loads of both deterministic and stochastic character, have been compared. The simple load cases include loads from gravity- and centrifugal forces, and fully satisfactory predictions were obtained from the model. For the complex load cases three turbines, ranging in size from 300 kW to 2 MW and operating under different conditions (with respect to mean wind speed, turbulence intensity, turbulence length scale, and coherence), have been simulated with the code and subsequently compared with measurements performed. Blade-, rotor, and tower loads have been compared in terms of time series, azimuthal binned signals, and power spectra. A most satisfactory consistency between simulations and measurements is obtained for the load cases outside the stall-region, in agreement with the aerodynamic linearizations inherent in the model. (au) (13 tabs., 131 ills., 11 refs.)}
place = {Denmark}
year = {1994}
month = {Oct}
}