Design and CFD study of a hybrid vertical-axis wind turbine by employing a combined Bach-type and H-Darrieus rotor systems

Hosseini, Arian; Goudarzi, Navid

doi:10.1016/j.enconman.2019.03.068

Cited by 100 publications

(31 citation statements)

References 37 publications

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“…They claim that this angle increases the capability of the self-starting at low wind speeds conditions, and the three-bladed turbine has the self-starting capability, regardless of the starting position of the turbine. Hosseini and Goudarzi (2019) aimed to design, simulate and investigate the performance of the hybrid vertical axis wind turbine in order to increase the self-starting capability and operational range of the turbine. In this study, two-bladed Savonius Bach-type turbine and three-bladed H-type VAWT have been used to design a hybrid turbine by using the CFD method.…”

Section: Self-starting and Current Studiesmentioning

confidence: 99%

“…Although the external power sources are generally used to start-up the turbine, the need for the turbine assistance to start brings extra complexity and energy expense (Bos, 2012). Therefore, in order to address this challenge, several solutions have been proposed such as the Hybrid turbine designs (Bhuyan and Biswas, 2014;Hosseini and Goudarzi, 2019;Liu et al, 2019) which consist of the Darrieus and Savonius wind turbines, and the active/passive pitching mechanism design (Nahas, 1993). However, the major problem with these kinds of solutions is that the power performance of the turbine is decreased while the self-starting capability is enhanced.…”

Section: Introductionmentioning

confidence: 99%

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Aerodynamic investigation of the start-up process of H-type vertical axis wind turbines using CFD

Celik

Ingham

et al. 2020

Journal of Wind Engineering and Industrial Aerodynamics

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In this study, a CFD start-up model has been built after conducting the sensitivity studies to evaluate the selfstarting behaviour of the H-type vertical axis wind turbines (VAWTs). The self-starting behaviour of a wellinvestigated VAWT is used for the model validation, and then the details of aerodynamics of the start-up process have been examined. Finally, the effect of the moment of inertia and the blade number on the aerodynamic behaviour of the self-starting and power performance of the H-type VAWT are analysed. It has been found that in the critical region, where TSR<1, the contribution of the drag to the torque generation plays a significant role in the second and third quarters of the rotor revolution, where the azimuthal position varies between 100° and 253°. The results also show that increasing the turbine inertia did not show a noticeable effect on the start-up behaviour of the turbine and final rotational speed. However, an increase in the instantaneous turbine power during the start-up process after the optimum TSR is observed with decreasing the turbine inertia. The current findings also show that an increase in the blade number makes the turbine easier to start-up; however, this may reduce the turbine power coefficient.

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Section: Self-starting and Current Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Aerodynamic investigation of the start-up process of H-type vertical axis wind turbines using CFD

Celik

Ingham

et al. 2020

Journal of Wind Engineering and Industrial Aerodynamics

View full text Add to dashboard Cite

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“…In order to define the size and geometry of the sketch, dimensions are added to the sketch. Various relation tools like tangent, parallel, perpendicular, concentric are used so define the attributes [6].…”

Section: A Software Used For Designing -Solidworkmentioning

confidence: 99%

Development of Flapping Panel Vertical Axis Wind Turbine

Pandyaraj*,

Ravinthiran

2019

IJITEE

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In a developing nation like India, electricity has become one of the most important basic needs nowadays. Coal and gasoline based power generation capacity stands at 71% in India, which contributes to a considerable part of air pollution. There are various renewable energy sources which are pollution free, one among them is the wind energy. So the main objective of the project is to facilitate pollution free power generation for individual purpose. In order to understand the problem and working, a flapping panel vertical axis wind turbine was designed. The main advantage of using a vertical axis wind turbine is that it need not pointed towards the wind and also vertical axis wind turbine is more comfortable to erect for domestic purposes. The flapping panel wind turbine is designed using solidworks software and analysed using Ansys Fluent. By making use of the wind, the flapping panels attached to the shaft rotate and the rotor is connected to the permanent magnet electricity generator (PMG). The PMG converts the Kinetic energy of the rotor shaft into electrical energy. The PMG we have used has the capacity of producing maximum power at 1200rpm. On calculating theoretically, the power output is found to be 8W for the rotation of 76.39 rpm and for 1200rpm the power output is calculated to be 125W. The entire wind turbine setup is compact in size and can be easily mounted and erected.

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“…They proved that coupling a batch-type VAWT with a Darrieus rotor can yield a higher power coefficient as compared to combining one Savonius rotor with one Darrieus one. However, the generated power is still lower than the power coefficient of the H-type VAWTs [15]. An idea that has been proposed recently is using an auxiliary blade close to the main blades.…”

Section: Introductionmentioning

confidence: 99%

Application of Simultaneous Symmetric and Cambered Airfoils in Novel Vertical Axis Wind Turbines

et al. 2021

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Two novel four-blade H-darrieus vertical axis wind turbines (VAWTs) have been proposed for enhancing self-start capability and power production. The two different airfoil types for the turbines are assessed: a cambered S815 airfoil and a symmetric NACA0018 airfoil. For the first novel wind turbine configuration, the Non-Similar Airfoils 1 (NSA-1), two NACA0018 airfoils, and two S815 airfoils are opposite to each other. For the second novel configuration (NSA-2), each of the S815 airfoils is opposite to one NACA0018 airfoil. Using computational fluid dynamics (CFD) simulations, static and dynamic conditions are evaluated to establish self-starting ability and the power coefficient, respectively. Dynamic stall investigation of each blade of the turbines shows that NACA0018 under dynamic stall impacts the turbine’s performance and the onset of dynamic stall decreases the power coefficient of the turbine significantly. The results show that NSA-2 followed by NSA-1 has good potential to improve the self-starting ability (13.3%) compared to the turbine with symmetric airfoils called HT-NACA0018. In terms of self-starting ability, NSA-2 not only can perform in about 66.67% of 360° similar to the wind turbine with non-symmetric airfoils (named HT-S815) but the power coefficient of NSA-2 at the design tip speed ratio of 2.5 is also 4.5 times more than the power coefficient of HT-S815; the power coefficient difference between HT-NACA0018 and HT-S815 (=0.231) is decreased significantly when HT-S815 is replaced by NSA-2 (=0.076). These novel wind turbines are also simple.

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Design and CFD study of a hybrid vertical-axis wind turbine by employing a combined Bach-type and H-Darrieus rotor systems

Cited by 100 publications

References 37 publications

Aerodynamic investigation of the start-up process of H-type vertical axis wind turbines using CFD

Aerodynamic investigation of the start-up process of H-type vertical axis wind turbines using CFD

Development of Flapping Panel Vertical Axis Wind Turbine

Application of Simultaneous Symmetric and Cambered Airfoils in Novel Vertical Axis Wind Turbines

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