Experimental and numerical investigations of aerodynamic characteristics for wind turbine airfoil using multi-suction jets

Elsayed, Ahmed M.; Khalifa, Mohamed; Benini, Ernesto; Aziz, M. A.

doi:10.1016/j.energy.2023.127503

Cited by 5 publications

(1 citation statement)

References 46 publications

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“…Moreover, studies by Özkan et al [ 29 ], Koca et al [ 30 ], and Genç [ 31 ] focus on improving aerodynamic performance in wind turbine blades and airfoils. The studies conducted by Genc et al [ 32 ], Açıkel et al [ 33 ], Karasu [ 34 ], Demir [ 35 ], Genç [ 36 ], and others [ 37 , 38 , 39 , 40 and 41 ] provide valuable insights into improving aerodynamic performance and flow control of various airfoil designs. The use of innovative techniques such as sandpaper control devices, acoustic excitation, and advanced transition models has shown promising results in enhancing lift, reducing drag, and delaying stall, which are crucial for applications like wind turbine blade design.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of multi-step airfoils in low Reynolds numbers applications

Aziz,

Gaheen,

Benini

et al. 2024

Heliyon

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Section: Introductionmentioning

confidence: 99%

Experimental investigation of multi-step airfoils in low Reynolds numbers applications

Aziz,

Gaheen,

Benini

et al. 2024

Heliyon

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Stall control on the wind turbine airfoil via the single and dual-channel of combining bowing and suction technique

Sun,

Qian,

Gao

et al. 2024

Energy

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Multiple boundary layer suction slots technique for performance improvement of vertical-axis wind turbines: Conceptual design and parametric analysis

Zhang,

Kuang,

et al. 2024

Physics of Fluids

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Vertical-axis wind turbines (VAWTs) are gaining attention for urban and offshore applications. However, their development is hindered by suboptimal power performance, primarily attributable to the complex aerodynamic characteristics of the blades. Flow control techniques are expected to regulate the flow on the blade surface and improve blade aerodynamics. In the present study, an effective active flow control technique, multiple boundary layer suction slots (MBLSS), is designed for VAWTs performance improvement. The impact of MBLSS on the aerodynamic performance of VAWTs is examined using high-fidelity computational fluid dynamics simulations. The response surface methodology is employed to identify the relatively optimal configuration of MBLSS. Three key parameters are considered, i.e., number of slots (n), distance between slots (d), and slot length (l), which vary from 2 to 4, 0.025c to 0.125c, and 0.025c to 0.075c, respectively. The results show that MBLSS positively affects the power performance and aerodynamics of VAWTs. Parameter n has the most significant effect on VAWT power performance and the importance of d and l is determined by tip speed ratios (TSRs). Tight and loose slot arrangements are recommended for high and low TSRs, respectively. The relatively optimal configuration (n = 2, d = 0.025c, l = 0.05c) results in a remarkable 31.02% increase in the average net power output of the studied TSRs. The flow control mechanism of MBLSS for VAWT blade boundary layer flow has also been further complemented. MBLSS can prevent the bursting of laminar separation bubbles and avoid the formation of dynamic stall vortices. This increases the blade lift-to-drag ratio and mitigates aerodynamic load fluctuations. The wake profiles of VAWTs with MBLSS are also investigated. This study would add value to the application of active flow control techniques for VAWTs.

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Experimental and numerical investigations of aerodynamic characteristics for wind turbine airfoil using multi-suction jets

Cited by 5 publications

References 46 publications

Experimental investigation of multi-step airfoils in low Reynolds numbers applications

Experimental investigation of multi-step airfoils in low Reynolds numbers applications

Stall control on the wind turbine airfoil via the single and dual-channel of combining bowing and suction technique

Multiple boundary layer suction slots technique for performance improvement of vertical-axis wind turbines: Conceptual design and parametric analysis

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