Performance analysis of a horizontal axis wind turbine

This paper presents a performance analysis of a horizontal axis wind turbine with an atypical design. The performance analysis was performed by a measurement in a low-speed wind tunnel. The atypical design of the horizontal axis wind turbine mimics the design of a radial turbine. The wind turbine was, however, simplified by “removing” the conventional stationary parts of the radial turbine, such as portion of the case or guide vanes. The paper describes the measurement test bed and compares the performance of this atypical wind turbine with more conventional designs.

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Experimental Study on Flow around Blades of Horizontal Axis Wind Turbine in Wind Tunnel (2nd Report, Studies on the Flow around Blade Based on Pressure Distribution)

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B ◽

10.1299/kikaib.71.1383 ◽

2005 ◽

Vol 71 (705) ◽

pp. 1383-1389 ◽

Cited By ~ 1

Author(s):

Takao MAEDA ◽

Yasunari KAMADA ◽

Yusaku SAKAI ◽

Naoki TAKAHARA

Keyword(s):

Experimental Study ◽

Wind Tunnel ◽

Wind Turbine ◽

Pressure Distribution ◽

Horizontal Axis ◽

Horizontal Axis Wind Turbine

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Analysis of Unsteady Flows Past Horizontal Axis Wind Turbine Airfoils Based on Harmonic Balance Compressible Navier-Stokes Equations With Low-Speed Preconditioning

Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Wind Turbine Technology ◽

10.1115/gt2011-45303 ◽

2011 ◽

Cited By ~ 6

Author(s):

M. Sergio Campobasso ◽

Mohammad H. Baba-Ahmadi

Keyword(s):

Wind Turbine ◽

Time Domain ◽

Harmonic Balance ◽

Stokes Equations ◽

Unsteady Aerodynamics ◽

Horizontal Axis ◽

Navier Stokes ◽

Horizontal Axis Wind Turbine ◽

Low Speed ◽

Computational Performance

This paper presents the numerical models underlying the implementation of a novel harmonic balance compressible Navier-Stokes solver with low-speed preconditioning for wind turbine unsteady aerodynamics. The numerical integration of the harmonic balance equations is based on a multigrid iteration, and, for the first time, a numerical instability associated with the use of such an explicit approach in this context is discussed and resolved. The harmonic balance solver with low-speed preconditioning is well suited for the analyses of several unsteady periodic low-speed flows, such as those encountered in horizontal axis wind turbines. The computational performance and the accuracy of the technology being developed are assessed by computing the flow field past two sections of a wind turbine blade in yawed wind with both the time- and frequency-domain solvers. Results highlight that the harmonic balance solver can compute these periodic flows more than 10 times faster than its time-domain counterpart, and with an accuracy comparable to that of the time-domain solver.

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Analysis of Unsteady Flows Past Horizontal Axis Wind Turbine Airfoils Based on Harmonic Balance Compressible Navier-Stokes Equations With Low-Speed Preconditioning

Journal of Turbomachinery ◽

10.1115/1.4006293 ◽

2012 ◽

Vol 134 (6) ◽

Cited By ~ 22

Author(s):

M. Sergio Campobasso ◽

Mohammad H. Baba-Ahmadi

Keyword(s):

Wind Turbine ◽

Time Domain ◽

Harmonic Balance ◽

Stokes Equations ◽

Unsteady Aerodynamics ◽

Horizontal Axis ◽

Navier Stokes ◽

Horizontal Axis Wind Turbine ◽

Low Speed ◽

Computational Performance

This paper presents the numerical models underlying the implementation of a novel harmonic balance compressible Navier-Stokes solver with low-speed preconditioning for wind turbine unsteady aerodynamics. The numerical integration of the harmonic balance equations is based on a multigrid iteration, and, for the first time, a numerical instability associated with the use of such an explicit approach in this context is discussed and resolved. The harmonic balance solver with low-speed preconditioning is well suited for the analyses of several unsteady periodic low-speed flows, such as those encountered in horizontal axis wind turbines. The computational performance and the accuracy of the technology being developed are assessed by computing the flow field past two sections of a wind turbine blade in yawed wind with both the time-and frequency-domain solvers. Results highlight that the harmonic balance solver can compute these periodic flows more than 10 times faster than its time-domain counterpart, and with an accuracy comparable to that of the time-domain solver.

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