Effect of barchan dune guide blades on the performance of a lotus-shaped micro-wind turbine

Wang, Yanfei; Zhan, Mao-Sheng

doi:10.1016/j.jweia.2014.10.014

Cited by 7 publications

(4 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some wind turbine designs focus more on one particular operational requirement than others. One such example is the Lotus-shaped micro wind turbine that is used almost exclusively for decorative purposes in urban areas due to its aesthetic appeal (Wang and Zhan, 2015). Relative to other designs, the power generated by Lotus turbines is not significant, and is usually not the main reason for deployment (Wang and Zhan, 2015).…”

Section: Previous Workmentioning

confidence: 99%

“…One such example is the Lotus-shaped micro wind turbine that is used almost exclusively for decorative purposes in urban areas due to its aesthetic appeal (Wang and Zhan, 2015). Relative to other designs, the power generated by Lotus turbines is not significant, and is usually not the main reason for deployment (Wang and Zhan, 2015). Vertical axis wind turbines (VAWT) are known to perform well in built environments due to their multidirectional ability in turbulent flow (Elkhoury et al, 2015).…”

Section: Previous Workmentioning

confidence: 99%

See 1 more Smart Citation

High-order detached eddy simulation of unsteady flow around NREL S826 airfoil

Yalcin

Cengiz

Özyörük

2018

Journal of Wind Engineering and Industrial Aerodynamics

View full text Add to dashboard Cite

In the vast majority of cases, winds are considered to be stationary and as such are treated in the same way for design purposes. However, not all wind is the same, and non-stationary winds such as thunderstorm downbursts and tornadoes need to be considered using a different framework. This paper outlines two possible analytical models for such winds and introduces a possible framework which may be of use to the urban designer.

show abstract

Section: Previous Workmentioning

confidence: 99%

Section: Previous Workmentioning

confidence: 99%

High-order detached eddy simulation of unsteady flow around NREL S826 airfoil

Yalcin

Cengiz

Özyörük

2018

Journal of Wind Engineering and Industrial Aerodynamics

View full text Add to dashboard Cite

show abstract

“…Several studies also present a temporal discretization analysis: [10] uses 1 degrees/step, [11] reports 0.25 degree/step, while [12] uses 0.12 degrees/step, and [13] uses 0.02s. Based in these results, a verification study was performed using time steps ranging from 0.5 degrees/step to 1.5 degrees/step at a tip speed ratio of 1.0 and a free stream speed of 9 m/s.…”

Section: Grid and Time Step Independence Analysismentioning

confidence: 99%

3D Numerical Study Of Hill Mounted VAWT

Belabes¹,

Paraschivoiu²

2018

Progress in Canadian Mechanical Engineering

View full text Add to dashboard Cite

The ground topography effect on the wind flow is significant. The knowledge of the flow behavior near ground is crucial in the development of wind power, especially in the choice of suitable sites and for estimation of energy production. In this paper, the numerical prediction of the flow over a three-dimensional hill model and the analysis of placement of Savonius turbines on top of the hill are presented. The numerical analysis is based on the finite volume method implemented in the ANSYS CFX 15 Software using the Shear-Stress Transport (SST) turbulence model. The numerical results for a conventional Savonius rotor and a vertical-axis spiral wind rotor are both satisfactory compared with experimental data. The performances of these turbines, installed on the hilltop, are studied for different height positions. Furthermore, the influence of the hill size on the extracted power is investigated. At TSR=1, the power coefficient of a conventional rotor is increased from 0.15 to 0.32 when the rotor is installed at a height of 0.25 m above the top of the hill, while it reaches 0.40 when the hill is two to three times higher. The helical Savonius rotor tested gives even higher power coefficient of 0.44.

show abstract

“…Wang et al [12] have used a barchans dune as a model to design the guide vanes of a wind turbine. They designed a lotus shaped guide vane as a decoration for urban areas.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Optimal Omni-Direction-Guide-Vane Design for Vertical Axis Wind Turbines Based on Unsteady Flow CFD Simulation

et al. 2016

View full text Add to dashboard Cite

With soaring energy demands, the desire to explore alternate and renewable energy resources has become the focal point of various active research fronts. Therefore, the scientific community is revisiting the notion to tap wind resources in more rigorous and novel ways. In this study, a two-dimensional computational investigation of the vertical axis wind turbine (VAWT) with omni-direction-guide-vane (ODGV) is proposed to determine the effects of this guide vane. In addition, the mesh and time step (dt) size dependency test, as well as the effect of the different turbulence models on results accuracy are investigated. Eight different shape ratios (R) of the omni-direction-guide-vane were also examined in this study. Further, the CFD model is validated by comparing the numerical results with the experimental data. Validation results show a good agreement in terms of shape and trend in CFD simulation. Based on these results, all the shape ratios, except two ratios including 0.3 and 0.4 at TSR of 1.3 to 3, have a positive effect on the power and torque coefficient improvement. Moreover, results show that the best case has a shape ratio of 0.55, which improves the power coefficient by 48% and the torque coefficient up to 58%.

show abstract

Effect of barchan dune guide blades on the performance of a lotus-shaped micro-wind turbine

Cited by 7 publications

References 30 publications

High-order detached eddy simulation of unsteady flow around NREL S826 airfoil

High-order detached eddy simulation of unsteady flow around NREL S826 airfoil

3D Numerical Study Of Hill Mounted VAWT

Investigation of the Optimal Omni-Direction-Guide-Vane Design for Vertical Axis Wind Turbines Based on Unsteady Flow CFD Simulation

Contact Info

Product

Resources

About