The aerodynamic performance of H-type darrieus VAWT rotor with and without winglets: CFD simulations

Cai, Xin; Zhang, Yuan; Ding, Wenxiang; Bian, Saixian

doi:10.1080/15567036.2019.1691286

Cited by 21 publications

(10 citation statements)

References 14 publications

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“…The secondary flow effect called "blade tip leakage flow," resulting in radial load jump in near tip region, could also be eliminated by the winglet. As a result, the negative torque generation near the tip of the blade could be reduced or even eliminated (Cai et al, 2019), resulting in better power production of the turbine.…”

Section: Wingletmentioning

confidence: 99%

“…Several studies have been performed to investigate the effect of winglet on the blade trailing‐edge flow behavior for performance improvement of straight‐bladed VAWTs (Cai et al, 2019; Daróczy et al, 2016; Zhang et al, 2019). The detailed comparison of these studies can be found in Table 1.…”

Section: Dynamic Stall Control Devices Implemented On Lvawtsmentioning

confidence: 99%

“…Overall, C p enhancement could reach between 10% and 19% at low regime of TSR s (Cai et al, 2019). Meanwhile, the regime of C p improvement reduced to between 6.7% and 10.5% in the optimum design of the winglet at medium regime of TSR s (Zhang et al, 2019).…”

Section: Dynamic Stall Control Devices Implemented On Lvawtsmentioning

confidence: 99%

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A review on the use of passive flow control devices as performance enhancement of lift‐type vertical axis wind turbines

Syawitri

Yao

et al. 2022

WIREs Energy & Environment

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This article provides a comprehensive review about passive flow control devices (PFCDs) implemented in lift‐type vertical axis wind turbine (LVAWT), focusing on the underlying flow physics mechanisms and to what extents they can improve the LVAWT performance. In addition, some novel concepts that can be potentially implemented in future are also presented. Based on literature review, it is observed that PFCDs can enhance the power generation of LVAWT up to 172.73% compared with a clean LVAWT. However, this significant improvement still needs to be evaluated carefully by considering the economic feasibility aspect, because PCFDs can increase the design complexity, weight penalty and manufacturing cost of LVAWT. Furthermore, it is essential to design and evaluate the effectiveness of PFCDs using a full VAWT configuration by considering the blade rotating effects and blade‐to‐blade interactions. Finally, evaluation of PFCDs needs to be performed at all ranges of tip speed ratios (TSRs) operation conditions, as there are clear evidences on the correlation between LVAWT performance and different range of TSRs. This article is categorized under: Sustainable Energy > Wind Energy

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Section: Wingletmentioning

confidence: 99%

Section: Dynamic Stall Control Devices Implemented On Lvawtsmentioning

confidence: 99%

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A review on the use of passive flow control devices as performance enhancement of lift‐type vertical axis wind turbines

Syawitri

Yao

et al. 2022

WIREs Energy & Environment

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“…• Generates drag because of the J shaped blades H-type Darrieus VAWT rotor with winglets (Figure 8 J) (Cai et al, 2019) • The power coefficient with winglet increased by 10-19% compared to the typical H-type rotor. • More output torque at all azimuth angles compared to the typical H-type rotor.…”

Section: • Drag Device • Low Efficiencymentioning

confidence: 99%

Aerodynamic Performance of Vertical and Horizontal Axis Wind Turbines: A Comparison Review

Eftekhari

Al-Obaidi

Eftekhari

2021

Indonesian J. Sci. Technol

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The need for energy and electricity has been increasing globally, and this means more power is required from the power plants. Power plants, however, will then continue harming the earth because of the greenhouse gasses produced while generating energies that contribute to global warming. Using renewable sources to produce clean energies is one of the sustainable methods to deal with such challenges. Wind energy is one of the renewable sources, which is accessible anywhere on earth, creating green energy. Wind turbines are mainly categorized into Horizontal Axis Wind Turbines (HAWT) and Vertical Axis Wind Turbines (VAWT). This paper firstly presents a general comparison between the HAWTs and VAWTs. Then, it presents mathematical modelling for the aerodynamic factors of HAWT and Darrieus VAWT to assist the researchers to understand some key design aspects of wind turbines, such as lift/drag ratio, tip speed ratio, power coefficient, and torque coefficient. Also, this paper presents a review of the aerodynamic performance of the recent VAWT designs to help researchers to identify and choose the best model among the Savonius and Darrieus rotors for further development or designing a new model at different wind conditions. This comparison review shows that for a large scale HAWT upwind 3 bladed wind turbines are the most optimum. The helical Savonius rotors perform better by having positive torque coefficient at all azimuth angles. Moreover, helical Darrieus was found to produce lesser noise and suitable for conventional areas. hybrid Savonius-Darrieus rotors can solve the self-starting challenge of the VAWTs, and they are suitable at low wind speeds. At last, this review shows some of the recent hybrid Savonius-Darrieus rotors which would help to solve the low efficiency of Savonius rotor and self-starting challenge of Darrieus rotors.

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“…They used an experimental setup where the blades are interchangeable and found that four blades have lower power output than expected [5]. Cai et al [6] found that the aerodynamic performance of the near region of blade tips is improved with Winglets which increases the overall torque. But winglets do not improve it at every azimuth angle for each blade.…”

Section: Introductionmentioning

confidence: 99%

Design Analysis of Vertical Axis Wind Turbine Blade Using Biomimicry

Prathik

Narayanan

Kumar

2021

J. Mod. Mech. Eng. Technol.

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Performance and efficiency of a Vertical Axis Wind Turbine improved by using a modified turbine blade, derived from biological features, by harness more wind energy. The detailed simulations were carried in Q-blade’s X-foil, Java foil and Sim Scale software at low wind speed with bio-mimicable cambered foil add-ons to different biostructure blades such as Maple seed leaf, Eagle wing. Among these simulations, the Corrugated Dragonfly vein FX 63-137 foil shows improved performance over cambered foils and FX 63-37 itself. The Maple-Wing combined blade structure showed an improved lift-drag ratio with a high coefficient of power.

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The aerodynamic performance of H-type darrieus VAWT rotor with and without winglets: CFD simulations

Cited by 21 publications

References 14 publications

A review on the use of passive flow control devices as performance enhancement of lift‐type vertical axis wind turbines

A review on the use of passive flow control devices as performance enhancement of lift‐type vertical axis wind turbines

Aerodynamic Performance of Vertical and Horizontal Axis Wind Turbines: A Comparison Review

Design Analysis of Vertical Axis Wind Turbine Blade Using Biomimicry

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