Aerodynamic performance and characteristic of vortex structures for Darrieus wind turbine. I. Numerical method and aerodynamic performance

Sun, Xiaojing; Wang, Ying; An, Qimeng; Cao, Yang; Wu, Guoqing; Huang, Diangui

doi:10.1063/1.4893775

Cited by 13 publications

(6 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results showed that the previous shedding vortex could affect the development of a new vortex and the vortex intensity increased with the increase of the angle of attack. Sun et al [12] in 2014 and Li et al [13] in 2017 investigated the wind velocity distribution of flow fields around the VAWT at different TSRs by experimental measurements. In their studies, a wide range of low wind velocities was found from the internal region to the near-wake of the wind turbine.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of the Tip Vortex of a Straight-Bladed Vertical Axis Wind Turbine with Double-Blades

et al. 2017

View full text Add to dashboard Cite

Abstract:Wind velocity distribution and the vortex around the wind turbine present a significant challenge in the development of straight-bladed vertical axis wind turbines (VAWTs). This paper is intended to investigate influence of tip vortex on wind turbine wake by Computational Fluid Dynamics (CFD) simulations. In this study, the number of blades is two and the airfoil is a NACA0021 with chord length of c = 0.265 m. To capture the tip vortex characteristics, the velocity fields are investigated by the Q-criterion iso-surface (Q = 100) with shear-stress transport (SST) k-ω turbulence model at different tip speed ratios (TSRs). Then, mean velocity, velocity deficit and torque coefficient acting on the blade in the different spanwise positions are compared. The wind velocities obtained by CFD simulations are also compared with the experimental data from wind tunnel experiments. As a result, we can state that the wind velocity curves calculated by CFD simulations are consistent with Laser Doppler Velocity (LDV) measurements. The distribution of the vortex structure along the spanwise direction is more complex at a lower TSR and the tip vortex has a longer dissipation distance at a high TSR. In addition, the mean wind velocity shows a large value near the blade tip and a small value near the blade due to the vortex effect.

show abstract

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of the Tip Vortex of a Straight-Bladed Vertical Axis Wind Turbine with Double-Blades

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Additionally, and at the maintenance terms, turbines will be stationary and the static torques (C ms ), static thrusts (C xs ), and static tangential forces (C Ts ) will impact the several parts and probably failures will occur. Figure 11 introduces a rapprochement between the turbines with several Present work (CFD) Castelli et al [5] (CFD) Hashem and Mohamed- [18] (CFD) Mohamed et al [12] (CFD) Sun et al [22] (CFD) Mohamed [7] Figure 9: Present CFD study versus the experimental results of [5] and other CFD results for a Darrieus turbines [5,7,12,18,22]. sectional pro le airfoils (NACA 0021, LS413, and S1046) for that aerodynamic forces coe cient.…”

Section: Resultsmentioning

confidence: 99%

“…e aerodynamic rapprochement and proximity of power coefficients C p between the current model and experimental results have been published by Castelli et al [5]. It was carried out as well as other CFD outputs [5,7,12,18,22] as shown in Figure 9. e comparison was quantitative and qualitative.…”

Section: Methodology and Model Validationmentioning

confidence: 99%

Aerodynamic Forces Affecting the H-Rotor Darrieus Wind Turbine

Alqurashi

Mohamed

2020

Modelling and Simulation in Engineering

View full text Add to dashboard Cite

Darrieus wind rotor is a vertical axis wind turbine that is a very promising kind of wind converters at remote and domestic locations that have soft and weak wind potential and speed, but from the quantitative comparison with horizontal axis wind turbines, this type of turbines has a weak performance. Additional researches are still needed to develop its efficiency to identify all the requirements of the generated power in low power demands. The aim of the current investigation is to analyze all the acting forces on the main parts of Darrieus rotor over the rotations as well as in maintenance and stationary conditions. Aerodynamic forces assessment will be executed for 3 different blade shapes (nonsymmetric and symmetric airfoils) like the airfoil section shapes of the Darrieus rotor blades. NACA 0021, LS413, and S1046 are selected as cross-sectional profile in this work. CFD simulations have been used in this work to get the different aerodynamic forces on the rotor blades of the Darrieus turbines. The present results indicated that the symmetric S1046 blade has higher forces during the rotation and stagnant (static) conditions. Moreover, the self-starting capability of NACA 0021 is better than S1046 due to low aerodynamic torsion on the S1046 blades.

show abstract

“…Fig16 The comparsion of calculated data with literature results and experiment values for VAWT It is observed that Sun et al[64] using one equation turbulence model (Spalart-Allmaras, S-A) produced large discrepancy relative to experimental data, especially at low to medium TSRs. The two-equation realizable k-ε model used by Castelli et al[48], although capable of replicating the shape of the experimental curve and…”

mentioning

confidence: 80%

Aerodynamic and aeroacoustic performance assessment of a vertical axis wind turbine by synergistic effect of blowing and suction

Liu

Miao

Bashir

et al. 2022

Energy Conversion and Management

View full text Add to dashboard Cite

Aerodynamic performance and characteristic of vortex structures for Darrieus wind turbine. I. Numerical method and aerodynamic performance

Cited by 13 publications

References 7 publications

Numerical Investigation of the Tip Vortex of a Straight-Bladed Vertical Axis Wind Turbine with Double-Blades

Numerical Investigation of the Tip Vortex of a Straight-Bladed Vertical Axis Wind Turbine with Double-Blades

Aerodynamic Forces Affecting the H-Rotor Darrieus Wind Turbine

Aerodynamic and aeroacoustic performance assessment of a vertical axis wind turbine by synergistic effect of blowing and suction

Contact Info

Product

Resources

About