Study on power performance for straight-bladed vertical axis wind turbine by field and wind tunnel test

Li, Qingan; Maeda, Takao; Kamada, Y.; Murata, Junsuke; Yamamoto, Masayuki; Ogasawara, Tatsuhiko; Shimizu, Kento; Kogaki, Tetsuya

doi:10.1016/j.renene.2016.01.002

Cited by 116 publications

(46 citation statements)

References 21 publications

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“…It is used to distinguish the flow of fluid in laminar and turbulent flow. In this study, the Reynolds number can be expressed as [16,37]:…”

Section: Data Processing Methodsmentioning

confidence: 99%

“…The torque coefficient C Q of the rotor which reflects the wind turbine performance can be expressed as [16,29,39]:…”

Section: Data Processing Methodsmentioning

confidence: 99%

“…They found that the resultant wind velocity increased and the maximum value of the angle of attack decreased with the increase of TSR. After that, to study the turbulence intensity effect on the wake field in natural wind, Li et al [16] in 2016 further explored the velocity distribution of flow fields around the rotors by field tests. From their study, it was found that the wind velocity in the field test had a quicker recovery than that in the wind tunnel.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation of the Tip Vortex of a Straight-Bladed Vertical Axis Wind Turbine with Double-Blades

et al. 2017

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Abstract:Wind velocity distribution and the vortex around the wind turbine present a significant challenge in the development of straight-bladed vertical axis wind turbines (VAWTs). This paper is intended to investigate influence of tip vortex on wind turbine wake by Computational Fluid Dynamics (CFD) simulations. In this study, the number of blades is two and the airfoil is a NACA0021 with chord length of c = 0.265 m. To capture the tip vortex characteristics, the velocity fields are investigated by the Q-criterion iso-surface (Q = 100) with shear-stress transport (SST) k-ω turbulence model at different tip speed ratios (TSRs). Then, mean velocity, velocity deficit and torque coefficient acting on the blade in the different spanwise positions are compared. The wind velocities obtained by CFD simulations are also compared with the experimental data from wind tunnel experiments. As a result, we can state that the wind velocity curves calculated by CFD simulations are consistent with Laser Doppler Velocity (LDV) measurements. The distribution of the vortex structure along the spanwise direction is more complex at a lower TSR and the tip vortex has a longer dissipation distance at a high TSR. In addition, the mean wind velocity shows a large value near the blade tip and a small value near the blade due to the vortex effect.

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“…It is used to distinguish the flow of fluid in laminar and turbulent flow. In this study, the Reynolds number can be expressed as [16,37]:…”

Section: Data Processing Methodsmentioning

confidence: 99%

“…The torque coefficient C Q of the rotor which reflects the wind turbine performance can be expressed as [16,29,39]:…”

Section: Data Processing Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Investigation of the Tip Vortex of a Straight-Bladed Vertical Axis Wind Turbine with Double-Blades

et al. 2017

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“…At present, the pleasant indoor environment still depends greatly on a large number of fossil fuels consumption, resulting energy crisis and serious environmental problems [2]. Therefore, it becomes more and more urgent to improve the energy utilization efficiencies [3][4][5] or resort to the utilization of renewable energy [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Study on an internally-cooled liquid desiccant dehumidifier with CFD model

Luo¹,

Chen

Yang

et al. 2017

Applied Energy

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“…In natural, wind is usually unsteady with high levels of turbulence in the short time, resulting in air flows characterized by rapid changes in the speed and direction (Burton et al, 2001;Emre Alpman, 2015;Li et al, 2016a). One of the wind conditions is called the extreme wind direction change, which is being focused on in this study.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of load fluctuation on horizontal axis wind turbine for extreme wind direction change

Sang

Murata

Morimoto

et al. 2017

JFST

Self Cite

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The operating conditions of Horizontal Axis Wind Turbine (HAWT) are extremely complex in natural surroundings. One of the wind conditions is called extreme wind direction change which has been specified in the International Electrotechnical Commission (IEC) 61400-1 standard. External conditions can generate extreme loads which may affect the power coefficient and the lifetime of HAWTs. This paper attempted to compile the evaluation of the aerodynamic forces acting on a small HAWT under extreme wind direction change condition in the wind tunnel experiments. An Avistar airfoil is used for the two-bladed and three-bladed wind turbines. This study is intended to clarify the load fluctuation when sudden wind direction change reacts to two-bladed and three-bladed wind turbines. A vane system is used to generate the wind direction change. A 6-component balance is used to measure the forces and the moments acting on the entire wind turbine in the three directions of x, y and z-axes. The results show that when the extreme wind direction change is generated, the yaw moment fluctuation amplitude of two-bladed wind turbine is about 39% larger than that of the three-bladed one. The strong dependence of the inflow timing of the wind direction change on the fluctuation amplitude can be seen only for the two-bladed wind turbine.

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Study on power performance for straight-bladed vertical axis wind turbine by field and wind tunnel test

Cited by 116 publications

References 21 publications

Numerical Investigation of the Tip Vortex of a Straight-Bladed Vertical Axis Wind Turbine with Double-Blades

Numerical Investigation of the Tip Vortex of a Straight-Bladed Vertical Axis Wind Turbine with Double-Blades

Study on an internally-cooled liquid desiccant dehumidifier with CFD model

Experimental investigation of load fluctuation on horizontal axis wind turbine for extreme wind direction change

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