Aerodynamic Analysis for Camber Effect in Vertical Wind Turbine System

The Vertical Axis Wind Turbine (VAWT) has advantages over Horizontal Axis Wind Turbine (HAWT) that it allows less chance to be degraded independent of wind direction and turbine can be operated even at the low wind speed. The objective of this study is to analyze aerodynamics of the VAWT airfoil and investigate the ideal shape of airfoil, more specifically cambers. The analysis of aerodynamic characteristics with various cambers has been performed using numerical simulation with CFD software. As the numerical simulation discloses local physical features around wind turbine, aerodynamic performance such as lift, drag and torque are computed for single airfoil rotation and multiple airfoil rotation cases. Through this study more effective airfoil shape is suggested based vortex-airfoil interaction studies.

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Computational Analysis of Airfoil Merging and its Effect on Performance of Lift Based Vertical Axis Wind Turbine

Volume 6B: Energy ◽

10.1115/imece2016-66274 ◽

2016 ◽

Author(s):

Akshay Basavaraj

Keyword(s):

Reynolds Number ◽

Wind Turbine ◽

Lift Coefficient ◽

Turbine Blades ◽

Vertical Axis ◽

Aerodynamic Characteristics ◽

Vertical Axis Wind Turbine ◽

Low Wind Speed ◽

Naca 0012 ◽

Selection Of

In regions of low wind speed, overcoming the starting torque of a Vertical Axis Wind Turbine (VAWT) becomes a challenge aspect. In order to overcome this adversity, careful selection of airfoils for the turbine blades becomes a priority. This paper tries to address the issue utilizing an approach wherein by observing the effect of merging two airfoils. Two airfoils which are of varying camber and thickness are merged and their aerodynamic characteristics are evaluated using the software XFOIL 6.96. For a variation in angle of attack from 0 to 90°, aerodynamic analysis is done in order to observe the behavior of one quarter of the entire VAWT cycle. An objective function is developed so as to observe the maximum possible torque generated by these airfoils at Reynolds number varying from 15,000–120,000. Due to change in the value of CL observed at Low Reynolds Number using commercial CFD softwares, multiple objective functions are utilized to observe the behavior over a range of Reynolds number. An experimental co-relation between the cut-in velocity and the lift-coefficient of the airfoils is developed in order to predict the cut-in velocity of the interpolated airfoils. The airfoils used for this paper are NACA 0012, NACA 0018, FX 66 S196, Clark Y (smooth), PT 40, SD 7032, A 18, SD 7080, SG 6043 and SG 6040.

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Methods Development for Determining the Aerodynamic Characteristics of Vertical Exist of Wind Turbine

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.630.79 ◽

2014 ◽

Vol 630 ◽

pp. 79-84

Author(s):

Vitaliy Lupoviy ◽

Andrej Papchenko

Keyword(s):

Numerical Simulation ◽

Wind Turbine ◽

Air Flow ◽

Flow Characteristics ◽

Vertical Axis ◽

Aerodynamic Characteristics ◽

Vertical Axis Wind Turbine ◽

Power Comparison ◽

Methods Development ◽

Working Section

Description of works for development of methods for determining the aerodynamic characteristics of vertical axis wind turbine is given in this article. Algorithm of aerodynamic tunnel designing and mounting is given. Compare air flow characteristics in working section of tunnel obtained by numerical simulation and probing. Describe the method of determining windwheel power. Comparison of the turbine characteristics obtained by this method with experimental dependences obtained earlier

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THE EFFECT OF DARRIEUS AND SAVONIUS WIND TURBINES POSITION ON THE PERFORMANCE OF THE HYBRID WIND TURBINE AT LOW WIND SPEED

10.31224/osf.io/grbmv ◽

2020 ◽

Author(s):

Nawfal M. Ali ◽

Abdul Hassan A. K ◽

Sattar Aljabair

Keyword(s):

Wind Speed ◽

Wind Turbine ◽

Wind Velocity ◽

Vertical Axis ◽

Aerodynamic Characteristics ◽

The Other ◽

Vertical Axis Wind Turbine ◽

Low Wind Speed ◽

Turbine Model ◽

Better Than

This paper presents an experimental and numerical simulation to investigate a hybrid vertical axis wind turbine model highly efficient which can be worked at low wind speed by studying the aerodynamic characteristics of four models of hybrid VAWTs. The hybrid WT consists of the SWT having two blades and the DWT type straight having two blades. Four models were constructed to study experimentally and numerically to choose the best model. Two models were DWT in the upper and SWT in the lower, also two models were SWT in the upper and DWT in the lower. The phase stage angle between the turbines is 0o and 90o . The experimental and numerical results showed that the performance of hybrid WT where DWT in the upper and SWT in the lower with phase stage 90o is better than in the other models, it can be started to work at a wind velocity of 2.2 m/s. At the wind velocity 3 m/s, the values of the parameters are the rotational speed (198 rpm), the CP (0.3195), the CT (0.2003), the TSR (1.6) and self-starting rotation at this value of wind velocity (3 m/s). The efficiency of extracting the wind power by hybrid WT is (51.2 %).

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Design, Simulation and Implementation of a 300W 24V Power Converters for Magnetic Levitation Vertical Axis Wind Turbine System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.679.14 ◽

2014 ◽

Vol 679 ◽

pp. 14-19 ◽

Cited By ~ 1

Author(s):

M.Z. Aihsan ◽

N.H. Baharudin ◽

T.M.N.T. Mansur ◽

R.B. Ali ◽

L.S. Sing ◽

...

Keyword(s):

Wind Turbine ◽

Magnetic Levitation ◽

Vertical Axis ◽

Energy System ◽

Power Converter ◽

Vertical Axis Wind Turbine ◽

Output Stage ◽

Low Wind Speed ◽

Wind Turbine System ◽

Three Phase

This paper presents a 300W AC/DC/AC power converter for wind energy system. Magnetic Levitation Vertical Axis Wind Turbine is used to harness energy at low wind speed of less than 3 m/s which is suitable for residential area in Malaysia. Three phase voltage produces by wind turbine is rectified using three phase rectifier. A boost converter is employed to convert the rectified DC voltage to a higher level. The output stage consists of full bridge circuit that produces a sinusoidal AC voltage using SPWM switching technique for common AC loads. When operating in rated condition, this system reduces 300W of energy consumption from utility.

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A 2D numerical simulation of blade twist effect on the aerodynamic performance of an asymmetric blade vertical axis wind turbine in low wind speed

EAI Endorsed Transactions on Energy Web ◽

10.4108/eai.13-7-2018.162828 ◽

2018 ◽

Vol 0 (0) ◽

pp. 162828

Author(s):

Hussain Mazarbhuiya ◽

Agnimitra Biswas ◽

Kaushal Sharma

Keyword(s):

Numerical Simulation ◽

Wind Speed ◽

Wind Turbine ◽

Vertical Axis ◽

Aerodynamic Performance ◽

Vertical Axis Wind Turbine ◽

Low Wind Speed ◽

2D Numerical Simulation ◽

Twist Effect

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Calculating the aerodynamics of vertical axis wind turbines

Vietnam Journal of Mechanics ◽

10.15625/0866-7136/34/3/2358 ◽

2012 ◽

Vol 34 (3) ◽

pp. 169-184 ◽

Cited By ~ 1

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.

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Power Experimental Optimization of Horizontal Axis Wind Turbine

Recent Advances in Electrical & Electronic Engineering (Formerly Recent Patents on Electrical & Electronic Engineering) ◽

10.2174/2352096511666180906150812 ◽

2020 ◽

Vol 13 (3) ◽

pp. 438-443

Author(s):

Sadek Ameziane ◽

Abdesselem Chikhi ◽

Mohammed Salah Aggouner

Keyword(s):

Wind Turbine ◽

Vertical Axis ◽

Energy System ◽

Spatial Filter ◽

Complex Model ◽

Vertical Axis Wind Turbine ◽

Horizontal Axis Wind Turbine ◽

Detailed Model ◽

Continuous Current ◽

Mechanical Sensors

Background: The presented article is a contribution to the realization of a wind emulator based on a continuous-current machine. The development of this topic focuses on the modeling of a vertical axis wind turbine, a DC motor with independent excitation and its control via a chopper. Methods: To carry out this work, we have studied and designed the electronic and mechanical sensors as well as a command implemented on the dSPACE DS1103 system. Results: The main purpose of this work is related, on one hand, to the control of the motor turbine by imposing the wind profile and on the other hand generate the command of the implanted MPPT. The experimental results obtained showed the great performances which characterize this improved wind energy system. Conclusion: Finally, a wind turbine with variable speed is a system having a complex model; however, a detailed model of the interaction between the wind and the aero-turbine is useful to understand certain phenomena such as rotational sampling or the spatial filter.

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