Performance of a vertical axis wind turbine in grid generated turbulence

Ahmadi-Baloutaki, Mojtaba; Carriveau, Rupp; Ting, David S.‐K.

doi:10.1016/j.seta.2014.12.007

Cited by 32 publications

(27 citation statements)

References 18 publications

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“…The range of tip speed ratios considered was adequate such that the peak power coefficient could be clearly distinguished. The results obtained were consistent in some way with the work of Ahmadi-Baloutaki et al [69]. Nonetheless, some interesting conclusions were made regarding the fact that the power coefficient was increased when using relatively low velocities.…”

Section: Vertical Axis Wind Turbinessupporting

confidence: 91%

“…Miau et al [68] showed how turbulence can reduce the sensitivity of the turbine performance to the Re number using wind tunnel testing. Ahmadi-Baloutaki et al [69] also performed tests on a model VAWT under controlled wind tunnel conditions using different levels of turbulence intensities (up to 10%) by means of turbulence grids. The authors showed that there was some improvement in performance with high turbulence levels compared to the very low turbulence intensity of 0.5%.…”

Section: Vertical Axis Wind Turbinesmentioning

confidence: 99%

“…Drew et al [9], Millward-Hopkins et al [10,11] Al-Quraan et al [12] Safari and Gasore [14] Mertens [13] Simões and Estanqueiro [15] Balduzzi et al [16] Yu et al [31], Shao et al [32], Murakami and Mochida [33], Wright and Wood [34], Lu and Ip [35], Lu and Sun [36], Toja-Silva et al [37], Wright and Wood [34], Shao et al [32], Abohela et al [22], Toja-Silva et al [40] Micallef et al [44] Guerri et al [45] Ebert and Wood [46] Wright and Wood [34] Howell et al [51], Tescione et al [52], Chong et al [94] Lam and Peng [54] Peng et al [55],Armstrong et al [57] Lanzafame et al [61], McNaughton et al [62], Trivellato and Raciti Castelli [64] Raciti Castelli et al [63] Mertens [65] Simão Ferreira et al [39] Chowdhury et al [67] Miau et al [68], Ahmadi-Baloutaki et al [69] Wekesa et al [70], Kear et al [91] Onol and Yesilyurt [72], Bedon et al [90], Kear et al [91], Wang et al…”

Section: Simulation Guidelinesmentioning

confidence: 99%

See 2 more Smart Citations

A Review of Urban Wind Energy Research: Aerodynamics and Other Challenges

Micaleff

Bussel

2018

Energies

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Urban wind energy research is crucial for the success or failure of wind turbines installed in the built environment. Research in this field is fragmented into various research groups working on different topics in isolation with seemingly few efforts of integrating the various fields. This review aims at highlighting the synergies between the various advances, particularly in aerodynamics, but also in other areas. Past and current work has been focused on establishing reliable wind statistics at the site of interest. Advances in building aerodynamics have provided new insight on the local flow occurring at the rotor location. An outlook toward future research and the need to treat the different flow scales in a holistic manner is emphasized given also the recent advances in rotor aerodynamics related to the effect of flow skewness and turbulence. This will shed light on the critical issues that need to be addressed by scientists in order to make urban wind energy viable for decentralized generation. Various other present challenges are discussed briefly including structural aspects, noise emissions, economics and visual impact. Research in this field should be the guidepost for more targeted certification standards, in an effort to regularize the small wind energy market.

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Section: Vertical Axis Wind Turbinessupporting

confidence: 91%

Section: Vertical Axis Wind Turbinesmentioning

confidence: 99%

Section: Simulation Guidelinesmentioning

confidence: 99%

See 1 more Smart Citation

A Review of Urban Wind Energy Research: Aerodynamics and Other Challenges

Micaleff

Bussel

2018

Energies

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“…However, the distribution of longitudinal turbulence field characteristics was not investigated considering the limited number of test points. Ahmadi-Baloutaki [18] found the turbulence downstream generated by the current grid to be quasi-isotropic in the wind tunnel and obtained the actual features of the problem but with the information unspecified in the entire turbulent field. Sponfeldner [19] used four space-filling fractal square grids and one regular square mesh grid to form high turbulence intensities for premixed V-shaped flames.…”

Section: State Of the Artmentioning

confidence: 99%

“…However, the effect of the grid parameters on the turbulent field was ignored. Melina [23], Ahmadi-Baloutaki [24], and Wang [25] applied the gridgenerated turbulence directly, without studying the turbulence characteristics.…”

Section: State Of the Artmentioning

confidence: 99%

Numerical and Experimental Studies on Grid-Generated Turbulence in Wind Tunnel

Liu¹,

Zhang²,

Wu³

et al. 2017

JESTR

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The grid-generated turbulence in wind tunnel is commonly applied in aerodynamic performance experiments of various industrial structures. However, the characteristics and application conditions of the grid-generated turbulence in the wind tunnel are often affected by the grid shape and the test position, respectively. Therefore, in order to clarify the influence of the grid shape and the test position on the grid-generated turbulence in wind tunnel, a computational fluid dynamics (CFD) numerical study on the turbulence generated by two different grids was presented herein, with the wind tunnel experimental validation. Firstly, time histories of the wind speed at 19 monitoring points behind the grid in wind tunnel were collected. Secondly, the entire turbulent field generated by two different grids was simulated using CFD. Then, the characteristics of the turbulence generated by the grids in wind tunnel were investigated. Finally, the accuracy of the CFD simulations compared with the wind tunnel test was studied. Results show that the grid blockage and the interference effect lead to a significant increase of 200% in the turbulence intensity near the grid. Moreover, the grid-generated turbulence conforms to the isotropic assumption only after a specific distance of 2.0-4.0 m from the grid. In addition, CFD errors are generally within 15%-20% of the corresponding measurements in the wind tunnel. This study provides guidance for selecting the installation location of the structure model in a wind tunnel.

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Innovative multiobjective optimization of a curved‐blade vertical axis wind turbine modeled by modified double multiple streamtube method

Sanaye,

Hosseinkhani

2024

Energy Science & Engineering

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The attractive specifications of vertical axis wind turbine (VAWT) are its operating with low noise and wind in various directions. To achieve a higher performance of these turbines, modeling of a curved‐blade VAWT by the modified double multiple streamtube (DMST) method and optimizing this wind turbine are performed. The power coefficient and the total normal force acting on blades were selected as two objective functions. Minimizing the normal force acting on turbine blades as the second objective function was not observed in the open literature. The amount of normal force is crucial in the structural design of VAWT because it generates both the bending moment on blades and forces on supporting arms of VAWT. Another innovation of this study is to consider the shape coefficient parameter that determines the shape of the rotor geometry as a design variable in optimization procedure. A 3 m height curved‐blade VAWT type was optimized by this multi‐objective optimization technique. The optimum values of the design variables obtained by the Genetic Algorithm were selecting an elliptical rotor geometry, pitch angle −1.4°, diameter/height 1.3, blade aspect ratio 19.8, tip speed ratio 4.3 and selecting three blades which could provide a power coefficient of 0.49 and a normal force of 158.7 N.

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Performance of a vertical axis wind turbine in grid generated turbulence

Cited by 32 publications

References 18 publications

A Review of Urban Wind Energy Research: Aerodynamics and Other Challenges

A Review of Urban Wind Energy Research: Aerodynamics and Other Challenges

Numerical and Experimental Studies on Grid-Generated Turbulence in Wind Tunnel

Innovative multiobjective optimization of a curved‐blade vertical axis wind turbine modeled by modified double multiple streamtube method

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