High-resolution numerical investigation into the effects of winglet on the aerodynamic performance for a three-dimensional vertical axis wind turbine

2020 ◽  
Vol 205 ◽  
pp. 112333 ◽  
Author(s):  
Wenhao Xu ◽  
Gaohua Li ◽  
Fuxin Wang ◽  
Ye Li
Keyword(s):  
High Resolution ◽  
Wind Turbine ◽  
Numerical Investigation ◽  
Three Dimensional ◽  
Vertical Axis ◽  
Aerodynamic Performance ◽  
Vertical Axis Wind Turbine

Numerical Investigation on Aerodynamic Performance for Guiding VAWT with Combined Blades

2010 ◽  
Vol 34-35 ◽  
pp. 376-382
Author(s):  
Qi Kun Wang
Keyword(s):  
Wind Turbine ◽  
Numerical Investigation ◽  
Convex Surface ◽  
Vertical Axis ◽  
Aerodynamic Performance ◽  
Dimensional Structure ◽  
Vertical Axis Wind Turbine ◽  
Linear Section ◽  
Aerodynamic Efficiency ◽  
New Type

In this paper, the reason was analyzed that the aerodynamic efficiency of the traditional vertical axis wind turbine (VAWT) was always low, and a new type of VAWT—Guiding VAWT was introduced. On that basis, a new blade shape called as combined blade for Guiding VAWT was proposed and numerical investigation was complemented on its aerodynamic performance by CFD (Computational Fluid Dynamics) technique. This Guiding VAWT includes two components: guiding impeller and rotating impeller, which are both combined blade in shape. The guiding blade is combined by three sections: inlet radial section, middle arc section and outlet linear section. The wind blade is combined by two sections, inlet arc section and outlet linear section. The combined guiding blade may not only avoid the wind impeller from the direct impact by the coming flow on its convex surface of the blade so as to decrease the drag torque but also improve the effective impact by the coming flow on the concave surface of the blade, both of which contribute the enhancement for the driving torque of the wind turbine. Results indicate: This new type of Guiding VAWT with combined blade has a wider operating range, higher aerodynamic efficiency than the traditional VAWTs. And more, this paper introduced the airfoil blade into this new type of VAWT and numerically validated that even though the flow inside VAWT was a large separated flow with variable attack angles, the aerodynamic advantage of the airfoil blade could still be shown to some extent, which hoped to further enhance the aerodynamic efficiency of the VAWT. Additionally, this new type of VAWT has a two dimensional structure for convenient manufacture, which has the latent energy to be popularized.

Numerical investigation on aerodynamic performance of a novel vertical axis wind turbine with adaptive blades

2016 ◽  
Vol 108 ◽  
pp. 275-286 ◽  
Author(s):  
Ying Wang ◽  
Xiaojing Sun ◽  
Xiaohua Dong ◽  
Bing Zhu ◽  
Diangui Huang ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Numerical Investigation ◽  
Vertical Axis ◽  
Aerodynamic Performance ◽  
Vertical Axis Wind Turbine

scholarly journals A numerical investigation into the influence of unsteady wind on the performance and aerodynamics of a vertical axis wind turbine

2014 ◽  
Vol 116 ◽  
pp. 111-124 ◽  
Author(s):  
Louis Angelo Danao ◽  
Jonathan Edwards ◽  
Okeoghene Eboibi ◽  
Robert Howell
Keyword(s):  
Wind Turbine ◽  
Numerical Investigation ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine

scholarly journals Numerical Simulation of Aerodynamic Performance of Off-grid Small Vertical Axis Wind Turbine

2018 ◽  
Vol 53 ◽  
pp. 02004
Author(s):  
Qiuyun Mo ◽  
Jiabei Yin ◽  
Lin Chen ◽  
Weihao Liu ◽  
Li Jiang ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Vertical Axis ◽  
Aerodynamic Performance ◽  
Velocity Fields ◽  
Compact Model ◽  
Vertical Axis Wind Turbine ◽  
Wind Turbine Blades ◽  
Rotation Domain ◽  
Rng Turbulence Model

In this paper, a 2D off-grid small compact model of vertical axis wind turbine was established. The sliding grid technology, the RNG turbulence model and the Coupld algorithm was applied to simulate the unsteady value of the model's aerodynamic performance. Through the analysis on the flow field at difference moments, the rules about velocity fields, vortices distributions and the wind turbine's total torque were obtained. The results show that: the speed around wind turbine blades have obvious gradient, and the velocity distribution at different times show large differences in the computional domain. In the rotating domain vorticity is large. With away from the rotation domain, vorticity reduced quickly. In the process of rotating for vertical axis wind turbine, the wind turbine's total torque showed alternating positive and negative changes.

Wind tunnel and numerical study of a straight-bladed Vertical Axis Wind Turbine in three-dimensional analysis (Part II: For predicting flow field and performance)

Energy ◽  
2016 ◽  
Vol 104 ◽  
pp. 295-307 ◽  
Author(s):  
Qing'an Li ◽  
Takao Maeda ◽  
Yasunari Kamada ◽  
Junsuke Murata ◽  
Toshiaki Kawabata ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Flow Field ◽  
Wind Turbine ◽  
Dimensional Analysis ◽  
Numerical Study ◽  
Three Dimensional ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
And Performance
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