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Analysis of Performance of the Darrieus Wind Turbines

Krzysztof Rogowski

Abstract

Aerodynamic loads and performances of vertical-axis wind turbines with the Darrieus rotor are performed by using the double-multiple streamtube (DMS) method and computational methods of fluid dynamics (CFD). Three models of wind turbines are considered for different geometry of the rotor (blade profile, chord, rotor diameter and solidity) and the operational conditions (Reynolds number and tip speed ratio). These models of wind turbines are developed on the basis of various articles. Because of the computation time, two-dimensional models of Darrieus wind turbines are taken into account during the CFD analysis. Due to the unsteady flow around the Darrieus rotor and the effects of the dynamic stall, the CFD results of aerodynamic loads are different depending on a turbulence model. Therefore the influence of different turbulence models is examined. The impact of dimensions of a computational area is tested as well. For the comparison of CFD results, the DMS method is used.
Record ID
WUT1897972e5f2c4da3acfba84485750143
Diploma type
Doctor of Philosophy
Author
Title in Polish
Analiza osiągów turbiny wiatrowej Darrieusa
Title in English
Analysis of Performance of the Darrieus Wind Turbines
Language
(en) English
Certifying Unit
Faculty of Power and Aeronautical Engineering (FPAE)
Discipline
mechanics / (technology domain) / (technological sciences)
Status
Finished
Start date
19-04-2011
Defense Date
14-11-2014
Title date
25-11-2014
Supervisor
Internal reviewers
External reviewers
Jens Nørkær Sørensen Jens Nørkær Sørensen,, External affiliation of publication: Technical University Of Denmark
Pages
137
Keywords in English
aerodynamic loads, turbine performance, computational methods of fluid dynamics
Abstract in English
Aerodynamic loads and performances of vertical-axis wind turbines with the Darrieus rotor are performed by using the double-multiple streamtube (DMS) method and computational methods of fluid dynamics (CFD). Three models of wind turbines are considered for different geometry of the rotor (blade profile, chord, rotor diameter and solidity) and the operational conditions (Reynolds number and tip speed ratio). These models of wind turbines are developed on the basis of various articles. Because of the computation time, two-dimensional models of Darrieus wind turbines are taken into account during the CFD analysis. Due to the unsteady flow around the Darrieus rotor and the effects of the dynamic stall, the CFD results of aerodynamic loads are different depending on a turbulence model. Therefore the influence of different turbulence models is examined. The impact of dimensions of a computational area is tested as well. For the comparison of CFD results, the DMS method is used.
Thesis file
  • File: 1
    Thesis.pdf
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Uniform Resource Identifier
https://repo.pw.edu.pl/info/phd/WUT1897972e5f2c4da3acfba84485750143/
URN
urn:pw-repo:WUT1897972e5f2c4da3acfba84485750143

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