Research and development of high-performance airfoil sections for vertical axis wind turbine at low-Reynolds number.

Seki, Kazuichi

doi:10.1299/kikaib.57.1297

Cited by 16 publications

(9 citation statements)

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“…Therefore, CFD computations are compared with experimental data covering the whole range of the angle of attack from -180 to +180 degrees. The wind tunnel experimental data of NACA642A015 airfoil at the Reynolds number of 1.3  10 5 [1] is utilized for this validation. The experimental/numerical results are compared in Fig.3.…”

Section: B Cfd Methodsmentioning

confidence: 99%

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Efficient Aerodynamic Shape Optimization of VAWT Airfoil and Its Validation

Yamazaki

Arakawa

2015

33rd Wind Energy Symposium

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In this paper, an efficient aerodynamic shape optimization of VAWT airfoil is performed with a Kriging response surface model approach. Numerical evaluations of various airfoil shapes are treated inexpensively by considering the apparent flow velocity magnitudes and apparent angles of attack at multiple positions of VAWT airfoil, which includes some assumptions as two dimensional steady flows, no consideration about flow interactions between blade airfoils and so on. An optimal VAWT airfoil is obtained by the minimization of a proposed objective function. Since our objective function for this design optimization of VAWT airfoil can be primary decomposed into the terms of thrust force and pitching moment, another multi-objective optimization of thrust/pitching moment coefficients is also performed for detailed discussions about the obtained optimal airfoil. The obtained optimal airfoil achieves a significant improvement in the aerodynamic performance compared with an existing airfoil. ANOVA analysis is also performed on the Kriging model to extract more engineering design information of the VAWT airfoil. Finally, expensive unsteady CFD simulations are performed for the obtained airfoils, that take into account unsteady flow interactions between three blade airfoils. The results of the unsteady CFD simulations validate the effectiveness of the proposed aerodynamic shape optimization approach of VAWT airfoil.

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Section: B Cfd Methodsmentioning

confidence: 99%

“…The latter has attracted much more attention in recent years, whose axis of rotation is perpendicular to the main flow. Many experimental/numerical investigations have been performed in the literature [1][2][3][4][5][6][7][8]. The VAWT has an advantage over the HAWT in the flexibility about the direction of the main flow.…”

Section: Introductionmentioning

confidence: 99%

Efficient Aerodynamic Shape Optimization of VAWT Airfoil and Its Validation

Yamazaki

Arakawa

2015

33rd Wind Energy Symposium

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“…The latter has attracted much more attention in recent years, whose axis of rotation is perpendicular to the main flow. Many experimental/numerical investigations have been performed in the literature (Seki, 1991, Ferreira et al, 2009, Howell et al, 2010, Carrigan et al, 2012, Greenblatt et al, 2012, Bah et al, 2013, Wakashima, et al, 2013, Firdaus et al, 2015, Yamazaki and Arakawa, 2015. The VAWT has an advantage over the HAWT in the flexibility about the direction of the main flow.…”

Section: Introductionmentioning

confidence: 99%

Experiment / simulation integrated shape optimization using variable fidelity Kriging model approach

Yamazaki

2017

JAMDSM

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“…The latter has attracted much more attention in recent years, whose axis of rotation is perpendicular to the main flow. Many experimental/numerical investigations have been performed in the literature (Bah, et al, 2013, Carrigan, et al, 2012, Ferreira, et al, 2009, Greenblatt, et al, 2012, Han, et al, 2013, Howell, et al, 2010, Seki, 1991, Wakashima, et al, 2012, Wakashima, et al, 2013. The VAWT has an advantage over the HAWT in the flexibility about the direction of the main flow.…”

Section: Introductionmentioning

confidence: 99%

Inexpensive airfoil shape optimization for vertical axis wind turbine and its validation

Yamazaki

Arakawa

2015

JFST

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In this research, an inexpensive aerodynamic shape optimization of airfoil is performed for Darrieus type vertical axis wind turbine (VAWT). Computational fluid dynamics (CFD) evaluations of various airfoil shapes are treated inexpensively by considering the apparent flow velocity magnitudes and apparent angles of attack at multiple positions of VAWT airfoil, which includes some assumptions as two dimensional steady flows and no consideration about flow interactions between blade airfoils. Global optimal shapes are efficiently explored by using a Kriging response surface model approach. An optimal VAWT airfoil is obtained by the maximization of a proposed objective function. Since our objective function for this design optimization of VAWT airfoil can be primary decomposed into the terms of thrust force and pitching moment, another multi-objective optimization of thrust/pitching moment coefficients is also performed for detailed discussions about the obtained optimal airfoil. Analysis of variance is performed on the Kriging response surface model to extract design knowledge in this design optimization problem. The obtained optimal airfoil achieves a significant improvement in the aerodynamic performance compared with an existing airfoil. Finally, expensive unsteady CFD simulations are performed for the obtained airfoils, that take into account unsteady flow interactions between three blade airfoils. The results of the unsteady CFD simulations validate the effectiveness of the proposed aerodynamic shape optimization approach for VAWT airfoil.

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Research and development of high-performance airfoil sections for vertical axis wind turbine at low-Reynolds number.

Cited by 16 publications

References 0 publications

Efficient Aerodynamic Shape Optimization of VAWT Airfoil and Its Validation

Efficient Aerodynamic Shape Optimization of VAWT Airfoil and Its Validation

Experiment / simulation integrated shape optimization using variable fidelity Kriging model approach

Inexpensive airfoil shape optimization for vertical axis wind turbine and its validation

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