scholarly journals Experimental and Computational Study of a Micro Vertical Axis Wind Turbine

2012 ◽  
Vol 49 ◽  
pp. 254-262 ◽  
Author(s):  
Abdulkadir Ali ◽  
Steve Golde ◽  
Firoz Alam ◽  
Hazim Moria
Keyword(s):  
Wind Turbine ◽  
Computational Study ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine

Investigation on Flow Characteristics and Performance of a Vertical Axis Wind Turbine With Deflector Plates

2019 ◽  
Author(s):  
K. Karthik Selva Kumar ◽  
Vinayak Kulkarni ◽  
Niranjan Sahoo
Keyword(s):  
Wind Turbine ◽  
Computational Study ◽  
Flow Characteristics ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
Near Wake ◽  
Flow Phenomenon ◽  
Sliding Mesh ◽  
And Performance ◽  
Accelerated Flow

Abstract In this article, a 3D computational study has been performed to understand the flow phenomenon over the vertical axis wind turbine with a three-bladed NACA0021. The rotary motion of the VAWT simulated with sliding mesh techniques with reference to the SST-Kω turbulence model using the CFD software. The observed results were found to be having a significant improvement in the enhancement of the power output. Also, the investigation was move forwarded to understand the flow characteristics of the VAWT with the presence of deflector plates in different orientation at the upstream conditions. The present of deflector plates creates an augmented flow phenomenon which creates an accelerated flow at the near wake region, causing a significant improvement in the coefficient of power of the wind turbine.

scholarly journals Airfoil selection and computational study on the torque performance of 4-blade vertical axis wind turbine

2018 ◽  
Vol 1139 ◽  
pp. 012040 ◽  
Author(s):  
Kalakanda Alfred Sunny ◽  
Pradeep Kumar ◽  
Nallapaneni Manoj Kumar ◽  
Joy Banerjee ◽  
G J Adheena
Keyword(s):  
Wind Turbine ◽  
Computational Study ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine

scholarly journals Unsteady Computational Study of Novel Biologically Inspired Offshore Vertical Axis Wind Turbine at Different Tip Speed Ratios: A Two-Dimensional Study

2019 ◽  
Vol 16 (2) ◽  
pp. 6753-6772
Author(s):  
S. N. Ashwindran ◽  
Azizuddin Abd Aziz ◽  
A. N. Oumer
Keyword(s):  
Wind Turbine ◽  
Computational Study ◽  
Leading Edge ◽  
Vertical Axis ◽  
Speed Ratio ◽  
Vertical Axis Wind Turbine ◽  
Biologically Inspired ◽  
Freestream Velocity ◽  
Fine Mesh ◽  
Moment Coefficient

The aim of this paper presents an unsteady numerical investigation of a novel biologically inspired vertical axis wind turbine. The simulation was conducted in 2D using the sliding mesh technique with non-conformal mesh spatial discretisation via FLUENT. Grid sensitivity study on mesh density and turbulent transport model indicated that fine mesh and medium converged well with trivial difference. SST and k-ω model presented stable behaviour and indicated good agreement. SST were chosen for the rest of the simulation. The proposed wind turbine was simulated at five different moderate tip speed ratios under the influence of freestream velocity U∞=8m/s. The highest moment coefficient is generated at tip speed ratio λ=1.3, which is Cm=0.1886 with a stable positive moment coefficient after 480°. The proposed turbine responded well at λ=1.3 and λ=1.7 with power coefficient result of Cp=0.245 and Cp=0.262 respectively. The effect of wake and voracity on the turbine at subjected tip speed ratios is studied. Wake regions induced by the leading edge of the aerofoil impacted the performance of the following blade. Furthermore, due to the less wake effect trailed by the leading edge at λ=1.3, it generates higher moment than λ=1.7. Since the proposed blade has a fixed 4° angle of attack, it was sensible for the turbine to experience such wake and vorticity effect.

Calculating the aerodynamics of vertical axis wind turbines

2012 ◽  
Vol 34 (3) ◽  
pp. 169-184 ◽  
Author(s):  
Hoang Thi Bich Ngoc
Keyword(s):  
Wind Turbine ◽  
Incidence Angle ◽  
Vertical Axis ◽  
Rotor Blades ◽  
Vertical Axis Wind Turbine ◽  
Horizontal Axis Wind Turbine ◽  
Velocity Triangle ◽  
Relationship Of ◽  
The Relationship

Vertical axis wind turbine technology has been applied last years, very long after horizontal axis wind turbine technology. Aerodynamic problems of vertical axis wind machines are discussible. An important problem is the determination of the incidence law in the interaction between wind and rotor blades. The focus of the work is to establish equations of the incidence depending on the blade azimuth, and to solve them. From these results, aerodynamic torques and power can be calculated. The incidence angle is a parameter of velocity triangle, and both the factors depend not only on the blade azimuth but also on the ratio of rotational speed and horizontal speed. The built computational program allows theoretically selecting the relationship of geometric parameters of wind turbine in accordance with requirements on power, wind speed and installation conditions.

Design and Analysis of Vertical Axis Wind Turbine

2017 ◽  
Author(s):  
Prof. R.K. Bhoyar ◽  
Prof. S.J. Bhadang ◽  
Prof. N.Z. Adakane ◽  
Prof. N.D. Pachkawade
Keyword(s):  
Wind Turbine ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine
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