Investigation of Coflow Jet Active Flow Control for Wind Turbine Airfoil

Xu, Kewei; Zha, Gecheng

doi:10.2514/6.2020-2942

Cited by 11 publications

(2 citation statements)

References 28 publications

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“…In active flow control, classification can be made according to the different control methods and control methods. A common way to control active flow is to use the mechanical properties of fluids to achieve control [4]. For example, controlling the behavior of flow by changing the speed and direction of the fluid.…”

Section: Introductionmentioning

confidence: 99%

Current study on active flow control and passive flow control

Yin

2023

TNS

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Flow control is a very important research direction in the field of fluid dynamics and one of the important research difficulties in the field of aerospace in the 21st century. This study aims to explore the principles and applications of active flow control and passive flow control, and analyze their practical applications in different fields. By conducting a literature review, this study collected and organized relevant literature and papers related to active flow control and passive flow control, and conducted a comprehensive summary and comparison. The research results indicate that both active flow control and passive flow control are of great significance and can improve efficiency or cost-effectiveness through different methods. The development process of active flow control has undergone evolution, and its basic principle is introduced by classifying different methods and technologies, such as bio-inspired mechanics regulation and jet lag, and illustrating their application principles with examples. Passive control methods require additional mechanical structures, such as ribbing, grooving, etc., in the boundary layer. The active control method requires energy input, and the flow control is achieved by controlling the energy input. By understanding and researching the technologies and methods of active flow control and passive flow control, it can provide reference and reference for researchers and engineers in related fields, and promote the development and application of flow control technology.

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Section: Introductionmentioning

confidence: 99%

Current study on active flow control and passive flow control

Yin

2023

TNS

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“…An energy consumption analysis showed that the CFJ is an economical AFC method for delaying or controlling stalls (Xu et al 2015;. Xu et al (2020) further optimized the injection and suction parameters of the CFJ-S809 airfoil. The optimum configuration can increase the max lift coefficient by 42.3% with a similar or higher lift-to-drag ratio even when considering the jet power consumption.…”

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confidence: 99%

Parameter-Based Design and Analysis of Wind Turbine Airfoils with Conformal Slot Co-Flow Jet

Xu²

2023

JAFM

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A co-flow jet (CFJ), an active flow control method combining blowing and suction control, can effectively suppress the stall of airfoils. However, the streamwise jet channel along the upper surface of a conventional CFJ airfoil reduces the thickness and camber of the baseline, degrading the aerodynamic performance when the jet is inactive. The conformal slot CFJ airfoil was proposed to address this problem, but the design method is still absent. This paper proposed a general design method based on parameters including the slot angle, transition shape and distance of the injection and suction slot. The mechanism of the best parameter was analyzed. The designed conformal slot CFJ airfoil was checked under different jet intensities, and the turbine power curve was predicted when substituting CFJ airfoils for the baseline. Compared with the conventional CFJ airfoil, the designed conformal slot CFJ airfoil has three advantages: eliminating the performance loss when the jet is off, saving jet energy when suppressing the flow separation, and improving the power generation of wind turbines at low wind speeds.

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