Unlike horizontal axis turbines, the Darrieus-type wind turbines have less efficiency and suffer from the self-starting inability. The effects of fixed and variable blade pitch angle as an idea for improving the performance of Darrieus turbine have been investigated using the CFD analysis, and a pitching system (variable pitch Darrieus-type wind turbine) has been proposed that can reduce both the blades oscillating motion and the magnitude of angle of attack in one revolution compared to that of the Darrieus-type wind turbines. In this study, the method of computational fluid dynamics with moving mesh has been used for analyzing the unsteady two-dimensional flow simulation. The numerical results show that the SST k-ω turbulence model matches well with the experimental results and can capture the flow separation phenomenon at low tip speed ratios. Also, it was observed that a small negative fixed pitch angle of −3° can delay the separation and improve the performance of wind turbine. The numerical simulation also showed that the variable-pitch blade turbine can reduce or eliminate the flow separation on its blades at a lower tip speed ratios than that of the fixed pitch blades. This result increases the starting torque and obtaining high efficiency with decreasing in torque ripple on blades during the turbine operation compared to that of the fixed-pitch blade Darrieus turbine.
Skip Nav Destination
Article navigation
September 2016
Research Article|
October 04 2016
Variable pitch blades: An approach for improving performance of Darrieus wind turbine
A. Sagharichi;
A. Sagharichi
Department of Mechanical Engineering,
Ferdowsi University of Mashhad
, Mashhad 91735, Iran
Search for other works by this author on:
M. J. Maghrebi;
M. J. Maghrebi
a)
Department of Mechanical Engineering,
Ferdowsi University of Mashhad
, Mashhad 91735, Iran
Search for other works by this author on:
A. ArabGolarcheh
A. ArabGolarcheh
Department of Mechanical Engineering,
Ferdowsi University of Mashhad
, Mashhad 91735, Iran
Search for other works by this author on:
a)
Author to whom correspondence should be addressed. Electronic mail: [email protected]
J. Renewable Sustainable Energy 8, 053305 (2016)
Article history
Received:
May 21 2016
Accepted:
September 15 2016
Citation
A. Sagharichi, M. J. Maghrebi, A. ArabGolarcheh; Variable pitch blades: An approach for improving performance of Darrieus wind turbine. J. Renewable Sustainable Energy 1 September 2016; 8 (5): 053305. https://doi.org/10.1063/1.4964310
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
Efficient wind farm layout optimization with the FLOWERS AEP model and analytic gradients
Michael J. LoCascio, Christopher J. Bay, et al.
Machine learning for modern power distribution systems: Progress and perspectives
Marija Marković, Matthew Bossart, et al.
Improving academic–industry collaboration: A case study of UK distribution system operators
Jamie M. Bright, Hilal Ozdemir, et al.
Related Content
A detailed investigation of a novel vertical axis Darrieus wind rotor with two sets of blades
J. Renewable Sustainable Energy (February 2017)
Parametric study of H-Darrieus vertical-axis turbines using CFD simulations
J. Renewable Sustainable Energy (September 2016)
Performance investigations of modified asymmetric blade H-Darrieus VAWT rotors
J. Renewable Sustainable Energy (June 2018)
Aerodynamic performance and starting torque enhancement of small-scale Darrieus type straight-bladed vertical axis wind turbines with J-shaped airfoil
J. Renewable Sustainable Energy (May 2024)
Computational fluid dynamics analysis of a twisted three-bladed H-Darrieus rotor
J. Renewable Sustainable Energy (August 2010)