Numerical analysis of the one-stage and two-stage helical Savonius vertical axis wind turbine

2022 ◽  
Author(s):  
S. Seralathan ◽  
P. S. Dinesh Kumar ◽  
Subham Singh ◽  
Rabin Raj ◽  
S. Sathish
Keyword(s):  
Numerical Analysis ◽  
Wind Turbine ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
Two Stage ◽  
One Stage ◽  
The One

Design and Test of a Vertical-Axis Wind Turbine with Pitch Control

2012 ◽  
Vol 225 ◽  
pp. 338-343 ◽  
Author(s):  
J.J. Miau ◽  
S.Y. Liang ◽  
R.M. Yu ◽  
C.C. Hu ◽  
T.S. Leu ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Vertical Axis ◽  
Aerodynamic Characteristics ◽  
Vertical Axis Wind Turbine ◽  
Variable Pitch ◽  
Pitch Control ◽  
Remarkable Improvement ◽  
The One ◽  
Variable Pitch Control ◽  
Starting Torque

The concept of pitch control has been implemented in the design of a small vertical-axis wind turbine. Benefits gained can be shown by the experimental and numerical results presented in this paper. As found, the method of variable pitch control outperforms the one of fixed pitch control. The present results show that the former can make remarkable improvement on the starting torque as well as the aerodynamic characteristics at low tip speed ratios.

Numerical Analysis of a Rooftop Vertical Axis Wind Turbine

2011 ◽  
Author(s):  
N. Cristobal Uzarraga-Rodriguez ◽  
A. Gallegos-Mun˜oz ◽  
J. Manuel Riesco A´vila
Keyword(s):  
Numerical Analysis ◽  
Wind Turbine ◽  
Numerical Study ◽  
Vertical Axis ◽  
Turbine Rotor ◽  
Aerodynamic Performance ◽  
Power Coefficient ◽  
Vertical Axis Wind Turbine ◽  
Sliding Mesh ◽  
Mesh Model

A numerical analysis of a rooftop vertical axis wind turbine (VAWT) for applications in urban area is presented. The numerical simulations were developed to study the flow field through the turbine rotor to analyze the aerodynamic performance characteristics of the device. Three different blade numbers of wind turbine are studied, 2, 3 and 4, respectively. Each one of the models was built in a 3D computational model. The effects generated in the performance of turbines by the numbers of blades are considered. A Sliding Mesh Model (SMM) capability was used to present the dimensionless form of coefficient power and coefficient moment of the wind turbine as a function of the wind velocity and the rotor rotational speed. The numerical study was developed in CFD using FLUENT®. The results show the aerodynamic performance for each configuration of wind turbine rotor. In the cases of Rooftop rotor the power coefficient increases as the blade number increases, while in the case of Savonius rotor the power coefficient decrease as the blades number increases.

A numerical analysis of unsteady inflow wind for site specific vertical axis wind turbine: A case study for Marsabit and Garissa in Kenya

2015 ◽  
Vol 76 ◽  
pp. 648-661 ◽  
Author(s):  
David Wafula Wekesa ◽  
Cong Wang ◽  
Yingjie Wei ◽  
Joseph N. Kamau ◽  
Louis Angelo M. Danao
Keyword(s):  
Numerical Analysis ◽  
Wind Turbine ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
Site Specific ◽  
Unsteady Inflow

scholarly journals NUMERICAL AND EXPERIMENTAL STUDY OF A TWO-STAGE SAVONIUS WIND TURBINE

2019 ◽  
Vol 18 (2) ◽  
pp. 52
Author(s):  
L. B. Kothe ◽  
A. P. Petry
Keyword(s):  
Experimental Study ◽  
Numerical Simulations ◽  
Wind Turbine ◽  
Vertical Axis ◽  
Relative Difference ◽  
Performance Comparison ◽  
Speed Ratio ◽  
Vertical Axis Wind Turbine ◽  
Two Stage ◽  
Index Method

This article presents a numerical and experimental study of vertical axis wind turbine performance comparison involving a two-stage Savonius rotor with similar parameters. The experimental study is conducted in the aerodynamic tunnel at the Fluid Mechanics Laboratory of the Federal University of Rio Grande do Sul. The aerodynamics rotors are manufactured by 3D prototyping technique. Numerical simulations are performed using the Finite Volumes Method performed by the solution of the Reynolds Averaged Navier-Stokes (RANS) and continuity equations using the SST k-ω turbulence model. The numerical domain is modeled in order to maintain the same characteristics of the experimental model. The mesh quality is evaluated through the GCI (Grid Convergence Index) method. The static and dynamic torque coefficients and the power coefficients are compared. The tests are made without blockage corrections due to the small blockage ratio from 7.5%. Results show that the turbine has a positive static torque coefficient for any rotor angles. The dynamic torque reaches the maximum value for a tip speed ratio (λ) of 0.2 for the experimental and numerical cases. The relative difference between the numerical simulations and the experimental results are between 3.8% and 13.4%.

518 Numerical Analysis for the Wind Tunnel Experiments of Savonius-type and Bach-type Vertical Axis Wind Turbine

2005 ◽  
Vol 2005 (0) ◽  
pp. 191-192
Author(s):  
Yusuke TSUKIMATA ◽  
Katsuya ISHIMATSU ◽  
Kazuyuki KAGE ◽  
Toyoyasu OKUBAYASHI ◽  
Hiroya SANO
Keyword(s):  
Numerical Analysis ◽  
Wind Tunnel ◽  
Wind Turbine ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
Wind Tunnel Experiments

scholarly journals A Fundamental Study on the Vertical-Axis Wind Turbine for Fishing Boat using Numerical Analysis

2013 ◽  
Vol 50 (6) ◽  
pp. 365-372
Author(s):  
Kwang-Leol Jeong ◽  
Young-Gill Lee ◽  
Yoon-Jin Ha ◽  
Bong Han Kang ◽  
Dae-Sun Kang
Keyword(s):  
Numerical Analysis ◽  
Wind Turbine ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
Fundamental Study ◽  
Fishing Boat
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