Effects of blade shape and its corresponding moment of inertia on self-starting and power extraction performance of the novel bowl-shaped floating straight-bladed vertical axis wind turbine

This paper performs a systematic numerical study to investigate the effect of rotation friction ratio on the power extraction performance of a passive rotation H-type vertical axis wind turbine (H-VAWT). In contrast to the previous literature, the present work does not impose rotation velocity on the turbine, and the rotation friction ratio which reflects the effect of external load characteristics on the turbine is introduced to the governing equation of the turbine. During each iteration, the rotation velocity of the turbine is computed after having determined the aerodynamic torque exerted on the blade of the turbine. This is more consistent with the actual working environment of the H-VAWT. A novel numerical coupling model was developed to simulate the interaction between the fluid and the passive rotation of the H-VAWT; then, the power extraction performance of the turbine with different rotation friction ratio was systematically analyzed. The results demonstrate that the power extraction performance of H-VAWT will be enhanced when the H-VAWT has appropriate rotation friction ratio. It is also found that the flow separation induced by large angle of attack is alleviated essentially if the H-VAWT has appropriate rotation friction ratio, which makes the H-VAWT have better energy extraction performance.

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1727 Transient Response of a Vertical Axis Wind Turbine in the Change of Wind Speed : Effects of Moment of Inertia

The proceedings of the JSME annual meeting ◽

10.1299/jsmemecjo.2007.2.0_361 ◽

2007 ◽

Vol 2007.2 (0) ◽

pp. 361-362

Author(s):

In-Seung KANG ◽

Tomoya AZUI ◽

Masaru KATO ◽

Yutaka HARA ◽

Tetuya KAWAMURA ◽

...

Keyword(s):

Wind Speed ◽

Wind Turbine ◽

Transient Response ◽

Vertical Axis ◽

Moment Of Inertia ◽

Vertical Axis Wind Turbine

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The Forceanalysis of the Vertical Axis Wind Turbine Arms

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.71-78.4794 ◽

2011 ◽

Vol 71-78 ◽

pp. 4794-4797

Author(s):

Zhong Guo Bian ◽

Cheng Xian Fan ◽

Shu Qin Liu

Keyword(s):

Wind Turbine ◽

Equilateral Triangle ◽

Maximum Stress ◽

Vertical Axis ◽

Moment Of Inertia ◽

Vertical Axis Wind Turbine ◽

The Moment

The strain on the arms of the H-VAWT is complex. The article makes analysis on the moment of inertia and maximum stress of the H-VAWT arms, and calculation is made on an equilateral triangle and a rhombus which has the same perimeter with the former. The article provides a method for analyzing the designation of H-VAWT.

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Effect of moment of inertia to H type vertical axis wind turbine aerodynamic performance

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/52/5/052014 ◽

2013 ◽

Vol 52 (5) ◽

pp. 052014 ◽

Cited By ~ 1

Author(s):

C X Yang ◽

S T Li

Keyword(s):

Wind Turbine ◽

Vertical Axis ◽

Aerodynamic Performance ◽

Moment Of Inertia ◽

Vertical Axis Wind Turbine

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EXPERIMENTAL COMPARATIVE STUDY BETWEEN MPPT, HYBRID P&O AND FUZZY CONTROL FOR A SMALL WIND TURBINE APPLICATION

DYNA ENERGIA Y SOSTENIBILIDAD ◽

10.6036/es10295 ◽

2021 ◽

Vol 10 (1) ◽

pp. [12 P.]-[12 P.]

Author(s):

IGNACIO MUGURUZA VELILLA ◽

ENEKO MOLA SANZ ◽

MARLON GALLO TORRES ◽

AITZOL UGARTEMENDIA ITURRIZAR ◽

GONZALO ABAD BIAIN ◽

...

Keyword(s):

Fuzzy Control ◽

Wind Turbine ◽

Fuzzy Controller ◽

Synchronous Generator ◽

Vertical Axis ◽

Maximum Power ◽

Vertical Axis Wind Turbine ◽

Power Extraction ◽

Small Wind Turbine ◽

Wind Profiles

ABSTRACT This study focuses on a comparison between different maximum power extraction controls for a small wind turbine application. In this case, a vertical axis wind turbine (VAWT) coupled to a permanent magnet synchronous generator (PMSG) is used. The analysis is performed for variable winds, so that a real small wind turbine application is simulated. An experimental platform and a wind tunnel are used to recreate the different wind profiles. Diverse controls are compared, a "classical" MPPT, a hybrid Perturb & Observe control and a fuzzy control. Artificial intelligence allows the creation of control algorithms that are not bound by the mechanical parameters of the wind turbine, thus avoiding the need to characterize the wind turbine and define the maximum power curve. It is determined that, for almost constant wind profiles, the hybrid Perturb & Observe extracts more energy. However, for the same profile with greater variability, the fuzzy controller extracts more energy.

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Computational Fluid Dynamics Study of a Modified Savonius Rotor Blade by Universal Consideration of Blade Shape Factor Concept

Journal of Advanced Research in Fluid Mechanics and Thermal Sciences ◽

10.37934/arfmts.85.1.2239 ◽

2021 ◽

Vol 85 (1) ◽

pp. 22-39

Author(s):

Abdel-Fattah Mahrous

Keyword(s):

Wind Turbine ◽

Shape Factor ◽

Rotor Blade ◽

Design Feature ◽

Vertical Axis ◽

Shape Design ◽

Vertical Axis Wind Turbine ◽

Savonius Rotor ◽

Turbine Performance ◽

Blade Shape

This work aims to investigate computationally the performance of Savonius vertical axis wind turbine having a new design feature for its blade geometry. The proposed design is based on a universal consideration of blade shape factor concept for the Savonius rotor blade. A blade shape factor ranges from zero to infinity, or vice versa, is considered in a single blade of the modified Savonius rotor. This means that each point in the two-dimensional blade profile of the suggested blade design has a single value of blade shape factor that is defined based on the dimensions of conventional semi-circular blade. The computational results of the proposed blade shape design, having blade shape factor varying from infinity to zero, showed an improvement in turbine performance as compared to conventional blade shape design. Moreover, increasing the operating range of Savonius wind turbine is expected.

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