Numerical investigation of the power and self-start performance of a folding-blade horizontal axis wind turbine with a downwind configuration

Chu, Yung-Jeh; Lam, Heung-Fai; Peng, H.Y.

doi:10.1080/15435075.2021.1930003

Cited by 5 publications

(5 citation statements)

References 35 publications

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“…Based on blade taper and pitch angle, Miao Weipao et al [6][9] added yaw conditions to study the output power and wake changes of wind turbines; Wang Qiang [8] and others analyzed the influence of elevation angle on the aerodynamic characteristics of wind turbines through numerical simulation methods; Chen Fudong and others [7] studied the effect of wind turbine pitch control on the aerodynamic performance of wind turbines under wind shear conditions. Chu Y.J.et al [10] designed a variable cone blade mechanism on wind turbines based on the wing of Borneo camphor seeds. Although there is relatively little research on blade taper at home and abroad, the above research reveals the feasibility of this field and provides research ideas for this article.…”

Section: Research Status Of Wind Turbine Blade Tapermentioning

confidence: 99%

The Effect of Blade Coning on the Flow Field of Wind Turbines under Yaw Conditions

Lan,

Zhao,

Jia

et al. 2023

J. Phys.: Conf. Ser.

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Most wind turbines operate under yaw conditions, which can reduce the output power of wind turbines. In order to improve the power of wind turbines under yaw conditions, this paper adopts a method of blade taper to study its impact on the wind turbine flow field. A 2000W wind turbine is chosen as the research object and SOILDWORKS software is employed to establish a model of blade taper. Three cone angles of 4 °, 8 °, and 12 ° were used, and numerical simulations were conducted using STARCCM+. It is found that under 30 ° yaw conditions, the blade with a cone angle of 12 ° had the highest output power, followed by 8 ° and 4 °. Compared to 4 °, the output power of 12 ° and 8 ° increased by 2.32% and 5.99%, respectively. At the same time, appropriately increasing the blade cone angle can also reduce the dissipation of tip vortices and center vortices in the flow field. By analyzing the limit streamline diagram, it can be concluded that the vorticity at an 8 ° cone angle is less than the other two cone angles under 30 ° operating conditions. Therefore, in this simulation, the comprehensive performance of the 8 ° cone angle is better, which not only improves the output power under 30 ° yaw, but also makes the operation of the wind turbine more stable.

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Section: Research Status Of Wind Turbine Blade Tapermentioning

confidence: 99%

The Effect of Blade Coning on the Flow Field of Wind Turbines under Yaw Conditions

Lan,

Zhao,

Jia

et al. 2023

J. Phys.: Conf. Ser.

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“…The dimension of the whole domain was similar to Ref. [10]. The boundary conditions include 10 m/s wind speed, 0.35% of turbulence intensity, 1.225 kg/m 3 of air density, and 1.46 × 10 -5 m 2 /s of kinematic viscosity.…”

Section: Computational Fluid Dynamics (Cfd) Modellingmentioning

confidence: 99%

“…The geometry of the benchmark wind turbine in this study is similar to the one modeled in Ref. [10], where the rotor diameter is 1 m, the SD8000 airfoil was adopted as the blade section throughout the span, and the pitch angle was zero degrees. There was no twisting on the blade sections along the span of the benchmark wind turbine model.…”

Section: Computational Fluid Dynamics (Cfd) Modellingmentioning

confidence: 99%

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A Thin Cambered Bent Biomimetic Wind Turbine Blade Design by Adopting the 3D Wing Geometry of a Borneo Camphor Seed

Yung-Jeh¹,

CHU²,

LAM³

et al. 2022

Preprint

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This study proposed a new thin cambered bent biomimetic wind turbine design that adopted the 3D geometry of the wing of a Borneo camphor seed sample. The wings of the Borneo camphor seed are thin, cambered, and bent. The unique geometry and orientation of the wings cause the seed to autorotate during propagation, subsequently slowing down its falling speed. It was presumed that by mimicking the wings of a Borneo camphor seed, a high-performance biomimetic wind turbine design could be proposed since the wind turbine, and Borneo camphor seed shares a similar rotating mechanism. Computational fluid dynamics was adopted to predict the power coefficient, thrust coefficient, and torque of the proposed biomimetic wind turbine models. The results show that the highest power coefficient was 0.3861 for the biomimetic wind turbine model, which is 20.14% higher than that of a benchmark case when the fold axis and fold angles are equal to 30° and 30°, respectively. The findings of this study concluded that the proposed biomimetic wind turbine design is cost-effective and worthy of further investigation.

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“…During the starting phase of the wind turbine in low wind speed regions, the lift-to-drag ratio of the wind turbine blade is low and the angle of attack is normally high, which restricts the starting of the wind turbine [22]. Chu et al [23] proposed a folding-blade design for the horizontal axis wind turbine in order improve the starting behavior of the wind turbine. Samuel et al [24] presented a modified vented NACA0012 aerofoil in an effort to increase the torque produced by a wind turbine at a low tip-speed ratio (TSR).…”

Section: Introductionmentioning

confidence: 99%

A Modeling Study Focused on Improving the Aerodynamic Performance of a Small Horizontal Axis Wind Turbine

Khan

2023

Sustainability

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The excessive burning of the fossil fuels has excessively changed the global temperature in the last few decades. The global warming caused due to the burning of the fossil fuels has initiated a need of increasing the use of renewal energy sources. The wind energy is one of the renewable energy sources that can mitigate the excessive global dependency on the fossil fuels. For locations with low-to-medium wind speeds (less than 7 m/s), the main problem is with the starting of the wind turbine. To start a stationary wind turbine, not only is it necessary to overcome the inertia and static friction of the turbine, but the angle of incidence of the wind relative to blade profile also needs to be favorable. Thus, at low wind speeds, the resulting low torque is not enough to start the turbine. It is, therefore, necessary to incorporate a good starting torque in the design requirements of turbines. In this paper, a modeling study is performed using the Pro/E, ADAMS and MATLAB software to improve the starting behavior of a horizontal axis wind turbine for the Cherat location in the northern areas of Pakistan. The yearly average wind speed in the northern areas of Pakistan is less than 5 m/s. The blade element momentum (BEM) theory is used to calculate the optimized wind turbine blade parameters (blade angles and chord lengths) that correspond to the maximum starting torque. Based on the optimized wind turbine blade parameters, Pro/E models were developed and imported to ADAMS software to calculate the torque. As compared to the initial wind turbine model, for the optimized wind turbine model, the starting torque increased from 22.5 N-m to 28 N-m and the coefficient of performance (COP) increased from 0.42 to 0.49 at a tip–speed ratio of 4. The starting torque of the wind turbine should exceed the resistive torques due to bearing friction, generator static, dynamic torque and the inertia of the rotor in order to start the wind turbine. The starting behavior of the horizontal axis wind turbine was successfully improved, and the optimized wind turbine model showed an increased starting torque for low-to-medium wind speed ranges.

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Numerical investigation of the power and self-start performance of a folding-blade horizontal axis wind turbine with a downwind configuration

Cited by 5 publications

References 35 publications

The Effect of Blade Coning on the Flow Field of Wind Turbines under Yaw Conditions

The Effect of Blade Coning on the Flow Field of Wind Turbines under Yaw Conditions

A Thin Cambered Bent Biomimetic Wind Turbine Blade Design by Adopting the 3D Wing Geometry of a Borneo Camphor Seed

A Modeling Study Focused on Improving the Aerodynamic Performance of a Small Horizontal Axis Wind Turbine

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