scholarly journals Computational flow field analysis of a vertical axis wind turbine

2011 ◽  
pp. 824-829 ◽  
Author(s):  
G. Colley ◽  
R. Mishra ◽  
H.V. Rao ◽  
R. Woolhead
Keyword(s):  
Flow Field ◽  
Wind Turbine ◽  
Vertical Axis ◽  
Field Analysis ◽  
Vertical Axis Wind Turbine ◽  
Flow Field Analysis

An Introduction to Flow Field Analysis Models for Wind Harnessing Machines

2016 ◽  
Author(s):  
Navid Goudarzi ◽  
Ramin Heydarlaki
Keyword(s):  
Flow Field ◽  
Power Systems ◽  
Wind Turbine ◽  
Vertical Axis ◽  
Field Analysis ◽  
Power Coefficient ◽  
Vertical Axis Wind Turbine ◽  
Wind Speeds ◽  
Flow Field Analysis ◽  
Analysis Models

Even though wind turbine industry is a mature technology, it fails in standalone power systems, especially in low wind speed regimes. Vertical axis wind turbine (VAWT)/unconventional configurations have shown a great potential for generating electricity in an expanded range of operation in residential, commercial, and off-grid property applications. Their low power coefficient values and high cost of energy at different wind speeds should be improved through more comprehensive studies. In this work, novel wind harnessing configurations to fill some of the existing wind turbine performance gaps are reviewed and compared. A number of flow field analysis models for wind harnessing machines is explored. The results show the strength of VAWTs compared to conventional horizontal axis wind turbines. Also, it introduces appropriate models for flow field analysis of VAWTs/unconventional wind harnessing machines to obtain an enhanced aerodynamic performance, to the greatest extent for both onshore and offshore applications. Finally, new designs to further expand the operational range of wind harnessing machines at a lower cost are proposed.

Investigation of aerodynamic forces and flow field of an H-type vertical axis wind turbine based on bionic airfoil

Energy ◽  
2021 ◽  
pp. 122999
Author(s):  
Yanfeng Zhang ◽  
Zhiping Guo ◽  
Xinyu Zhu ◽  
Yuan Li ◽  
Xiaowen Song ◽  
...  
Keyword(s):  
Flow Field ◽  
Wind Turbine ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
Aerodynamic Forces ◽  
Bionic Airfoil

Numerical Simulation of the Aerodynamic Performance of a H-Type Wind Turbine during Self-Starting

2014 ◽  
Vol 529 ◽  
pp. 296-302 ◽  
Author(s):  
Wei Zuo ◽  
Shun Kang
Keyword(s):  
Flow Field ◽  
Wind Turbine ◽  
Pitch Angle ◽  
Turbulence Modeling ◽  
Vertical Axis ◽  
Aerodynamic Performance ◽  
Time Dependent ◽  
Two Dimensional ◽  
Vertical Axis Wind Turbine ◽  
Sst Turbulence Model

The aerodynamic performance and the bypass flow field of a vertical axis wind turbine under self-starting are investigated using CFD simulations in this paper. The influence of pitch angle variations on the performance of the wind turbine during self-starting is presented. A two-dimensional model of the wind turbine with three blades is employed. A commercial software FlowVision is employed in this paper, which uses dynamic Cartesian grid. The SST turbulence model is used for turbulence modeling, which assumes the flow full turbulent. Based on the comparison between the computed time-dependent variations of the rotation speed with the experimental data, the time-dependent variations of the torque are presented. The characteristics of self-starting of the wind turbine are analyzed with the pitch angle of 0o、-2oand 2o. The influence of pitch angle variations on two-dimensional unsteady viscous flow field through velocity contours is discussed in detail.

S051024 Measurement of Flow Field around Airfoil of Vertical Axis Wind Turbine

2012 ◽  
Vol 2012 (0) ◽  
pp. _S051024-1-_S051024-5
Author(s):  
Tatsuya SHODA ◽  
Yuko UEDA ◽  
Masaya SHIGETA ◽  
Seiichiro IZAWA ◽  
Yu FUKUNISHI
Keyword(s):  
Flow Field ◽  
Wind Turbine ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine

Numerical Studies on the Effect of Cambered Airfoil Blades on Self-Starting of Vertical Axis Wind Turbine Part 2: NACA 0018 and NACA 63415

2015 ◽  
Vol 787 ◽  
pp. 245-249 ◽  
Author(s):  
Sivamani Seralathan ◽  
T. Micha Premkumar ◽  
S. Thangavel ◽  
G.P. Pradeep
Keyword(s):  
Flow Field ◽  
Wind Turbine ◽  
Lift Force ◽  
Turbine Blades ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
Numerical Studies ◽  
Airfoil Blades ◽  
Torque Values ◽  
Naca 0012

NACA 0012 and NACA 4415 were discussed in Part 1 of the paper to study the capabilities of the airfoil blades by considering the effect of cambered airfoil blade on self-starting of vertical axis wind turbine. The numerical studies are carried out to identify self-starting capability of the airfoil using CFD analysis by studying the flow field over the vertical axis wind turbine blades. In this Part 2 paper, detailed numerical results of asymmetrical NACA 0018 and cambered airfoil NACA 63415 are presented. The lift force generated and the rotor torque induced varies with angle of attack. Based on the contours of static pressure and velocity distribution as well as based on the torque induced in the flow field over blade profiles, NACA 0018 is found to be better compared to cambered airfoil. Even though the lift force for cambered airfoils are higher, based on the rotor torque values, the wind turbine with asymmetrical airfoil blades NACA 0012 is better by 9.80% compared with NACA 4415 and 21.73% compared with NACA 63415. Self-starting issue can be addressed by proper selection of NACA blade profiles. By comparing the four airfoil blades in Part 1 and Part 2 of the papers, the asymmetrical NACA 0012 is found to be most suitable airfoil for self-starting the vertical axis wind turbine (VAWT).

Three-dimensional flow field around and downstream of a subscale model rotating vertical axis wind turbine

2016 ◽  
Vol 57 (3) ◽  
Author(s):  
Kevin J. Ryan ◽  
Filippo Coletti ◽  
Christopher J. Elkins ◽  
John O. Dabiri ◽  
John K. Eaton
Keyword(s):  
Flow Field ◽  
Wind Turbine ◽  
Three Dimensional ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
Three Dimensional Flow ◽  
Dimensional Flow

Prediction of Aerodynamic Noise Radiated From a Vertical-Axis Wind Turbine

2003 ◽  
Author(s):  
Akiyoshi Iida ◽  
Akisato Mizuno ◽  
Kyoji Kamemoto
Keyword(s):  
Flow Field ◽  
Wind Turbine ◽  
Wind Turbines ◽  
Sound Source ◽  
Vertical Axis ◽  
Aerodynamic Performance ◽  
Low Noise ◽  
Aerodynamic Noise ◽  
Speed Ratio ◽  
Vertical Axis Wind Turbine

Unsteady flow field and flow induced noise of vertical axis wind turbine are numerically investigated. The flow field is numerically calculated by the vortex method with core-spreading model. This simulation obtains aerodynamic performance and aerodynamic forces. Aerodynamic noise is also simulated by using Ffowcs Williams-Hawkings equation with compact body and low-Mach number assumptions. Tip speed of rotor blades are not so high, then the contribution of the moving sound source is smaller than that of the dipole sound source. Since the maximum power coefficient of VAWT can be obtained at lower tip-speed ratio compared to the conventional, horizontal axis wind turbines, the aerodynamic noise from vertical axis wind turbine is smaller than that of the conventional wind turbines at the same aerodynamic performance. This result indicates that the vertical axis wind turbines are useful to develop low-noise wind turbines.

scholarly journals Flow field assessment in a vertical axis wind turbine

2010 ◽  
Author(s):  
R. Ricci ◽  
S. Montelpare ◽  
A. Secchiaroli ◽  
V. D’Alessandro
Keyword(s):  
Flow Field ◽  
Wind Turbine ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
Field Assessment

426 Research on the Flow Field around Low Tip Speed Ratio Type Straight Blade Vertical Axis Wind Turbine

2013 ◽  
Vol 2013.62 (0) ◽  
pp. 257-258
Author(s):  
Toshiaki KAWABATA ◽  
Takao MAEDA ◽  
Yasunari KAMADA ◽  
Junsuke MURATA ◽  
Qing'an LI
Keyword(s):  
Flow Field ◽  
Wind Turbine ◽  
Vertical Axis ◽  
Speed Ratio ◽  
Vertical Axis Wind Turbine ◽  
Straight Blade ◽  
Tip Speed Ratio
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