Measurements of the Aerodynamic Normal Forces on a 12-kW Straight-Bladed Vertical Axis Wind Turbine

Dyachuk, Eduard; Rossander, Morgan; Goude, Anders; Bernhoff, Hans

doi:10.3390/en8088482

Cited by 30 publications

(26 citation statements)

References 12 publications

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“…The experimental method and the obtained force data are described in detail in [17,18]. It follows that the measured normal force was periodic and consistent, while the tangential force response was highly disturbed by the turbine dynamics.…”

Section: Experimental Datamentioning

confidence: 99%

“…Wind flow was considered as steady for bins with the RSD of the asymptotic wind velocity V ∞ of RSD wake (V ∞ ) ≤ 10%, RSD disk (V ∞ ) ≤ 5% and the RSD of wind direction V dir of RSD wake,disk (V dir) ≤ 1%. This definition of the steady wind flow conditions is documented in [18]. Variations of the wind speed during the steady conditions are illustrated in Figure 4.…”

Section: Experimental Datamentioning

confidence: 99%

“…For the details regarding the measurement accuracy, the reader is referred to [17,18]. The air density ρ is calculated for the measured air temperature, pressure and humidity according to [17].…”

Section: Experimental Datamentioning

confidence: 99%

“…This study assesses measurements from 2014 on a straight-bladed VAWT, which operates at an open site with the average Reynolds number of 300, 000 [17,18]. A study on the power coefficient (C P ) of this VAWT from 2011 has shown that the turbine reaches its maximum C P of 0.29 at the TSR of 3.3 [19].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Numerical Validation of a Vortex Model against ExperimentalData on a Straight-Bladed Vertical Axis Wind Turbine

Dyachuk

Goude

2015

Energies

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Cyclic blade motion during operation of vertical axis wind turbines (VAWTs) imposes challenges on the simulations models of the aerodynamics of VAWTs. A two-dimensional vortex model is validated against the new experimental data on a 12-kW straight-bladed VAWT, which is operated at an open site. The results on the normal force on one blade are analyzed. The model is assessed against the measured data in the wide range of tip speed ratios: from 1.8 to 4.6. The predicted results within one revolution have a similar shape and magnitude as the measured data, though the model does not reproduce every detail of the experimental data. The present model can be used when dimensioning the turbine for maximum loads.

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Section: Experimental Datamentioning

confidence: 99%

Section: Experimental Datamentioning

confidence: 99%

Section: Experimental Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical Validation of a Vortex Model against ExperimentalData on a Straight-Bladed Vertical Axis Wind Turbine

Dyachuk

Goude

2015

Energies

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“…The power coefficient peaks at 0.29 at a tip speed ratio of 3.3. Recently, two papers presenting measurements of the tangential and normal forces on the 12 kW turbine have been presented [35,36]. As with the 200 kW VAWT, the power extracted by the turbine is limited by passive stall.…”

Section: Kw Turbinementioning

confidence: 99%

A Review of Research on Large Scale Modern Vertical Axis Wind Turbines at Uppsala University

2016

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This paper presents a review of over a decade of research on Vertical Axis Wind Turbines (VAWTs) conducted at Uppsala University. The paper presents, among others, an overview of the 200 kW VAWT located in Falkenberg, Sweden, as well as a description of the work done on the 12 kW prototype VAWT in Marsta, Sweden. Several key aspects have been tested and successfully demonstrated at our two experimental research sites. The effort of the VAWT research has been aimed at developing a robust large scale VAWT technology based on an electrical control system with a direct driven energy converter. This approach allows for a simplification where most or all of the control of the turbines can be managed by the electrical converter system, reducing investment cost and need for maintenance. The concept features an H-rotor that is omnidirectional in regards to wind direction, meaning that it can extract energy from all wind directions without the need for a yaw system. The turbine is connected to a direct driven permanent magnet synchronous generator (PMSG), located at ground level, that is specifically developed to control and extract power from the turbine. The research is ongoing and aims for a multi-megawatt VAWT in the near future.

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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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Measurements of the Aerodynamic Normal Forces on a 12-kW Straight-Bladed Vertical Axis Wind Turbine

Cited by 30 publications

References 12 publications

Numerical Validation of a Vortex Model against ExperimentalData on a Straight-Bladed Vertical Axis Wind Turbine

Numerical Validation of a Vortex Model against ExperimentalData on a Straight-Bladed Vertical Axis Wind Turbine

A Review of Research on Large Scale Modern Vertical Axis Wind Turbines at Uppsala University

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

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