Effect of morphed trailing-edge flap on aerodynamic load control for a wind turbine blade section

Chen, Zhuang; Yang, Gang; Zhu, Yawei; Hu, Dean

doi:10.1016/j.renene.2019.10.082

Cited by 30 publications

(15 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Several aeroelastic codes were developed for active load control on MW-scale turbines [56][57][58]. Indeed, the load-control effectiveness of ATEGs on wind turbines were reflected in numerous studies [59][60][61][62][63][64][65][66][67].…”

Section: Adaptive Trailing Edge Geometry (Ateg)mentioning

confidence: 99%

Review of Flow-Control Devices for Wind-Turbine Performance Enhancement

Akhter

Omar

2021

Energies

View full text Add to dashboard Cite

It is projected that, in the following years, the wind‐energy industry will maintain its rapid growth over the last few decades. Such growth in the industry has been accompanied by the desirability and demand for larger wind turbines aimed at harnessing more power. However, the fact that massive turbine blades inherently experience increased fatigue and ultimate loads is no secret, which compromise their structural lifecycle. Accordingly, this demands higher overhaul‐and‐maintenance (O&M) costs, leading to higher cost of energy (COE). Introduction of flow‐control devices on the wind turbine is a plausible solution to this issue. Flow‐control mechanisms feature the ability to effectively enhance/suppress turbulence, advance/delay flow transition, and prevent/promote separation, leading to enhancement in aerodynamic and aeroacoustics performance, load alleviation and fluctuation suppression, and eventually wind turbine power augmentation. These flow‐control devices are operated primarily under two schemes: passive and active control. Development and optimization of flow‐control devices present the potential for reduction in the COE, which is a major challenge against traditional power sources. This review performs a comprehensive and up‐to‐date literature survey of selected flow‐control devices, from their time of development up to the present. It contains a discussion on the current prospects and challenges faced by these devices, along with a comparative analysis centered on their aerodynamic controllability. General considerations and conclusive remarks are presented after the discussion.

show abstract

Section: Adaptive Trailing Edge Geometry (Ateg)mentioning

confidence: 99%

Review of Flow-Control Devices for Wind-Turbine Performance Enhancement

Akhter

Omar

2021

Energies

View full text Add to dashboard Cite

show abstract

“…Similarly, MacPhee and Beyene [20] examined a morphing bladed turbine through experimental and numerical analysis; as a result, they found the flexible design outperforms the rigid design and increases the power coefficient by up to +32.6%. Zhuang et al [21] studied the effect of a morphed trailing edge flap on the aerodynamic load control in a large wind turbine blade; the simulations revealed excellent load control capability. According to this, it is possible to observe the advantages that have been found due to the use of the shape morphing concept in wind turbines from the point of view of increasing the total efficiency of the turbine as well as controlling the load, reducing costs, and increasing the useful life of the overall renewable energy system.…”

Section: Introductionmentioning

confidence: 99%

The Effect of a Flexible Blade for Load Alleviation in Wind Turbines

et al. 2021

View full text Add to dashboard Cite

This article presents the analysis of the performance of a flexible wind turbine blade. The simulation analysis is based on a 3 m span blade prototype. The blade has a flexible surface and a cam mechanism that modifies the aerodynamic profile and adapts the surface to different configurations. The blade surface was built with a flexible fiberglass composite, and the internal mechanism consists of a flexible structure actuated with an eccentric cam. The cam mechanism deforms five sections of the blade, and the airfoil geometry for each section was measured from zero cam displacement to full cam displacement. The measured data were interpolated to obtain the aerodynamic profiles of the five sections to model the flexible blade in the simulation process. The simulation analysis consisted of determining the different aerodynamic coefficients for different deformed surfaces and a range of wind speeds. The aerodynamic coefficients were calculated with the BEM method (QBlade®); as a result, the data performance of the flexible blade was compared for the different deformation configurations. Finally, a decrease of up to approximately 6% in the mean bending moment suggests that the flexible turbine rotor presented in this article can be used to reduce extreme and fatigue loads on wind turbines.

show abstract

“…Active flow control technology includes synthetic jet, plasma exciter and deformable flap, and so on, which can be accurately controlled at the required time and position. Zhang et al 10 and Zhuang et al 11 have carried out in‐depth research on the application of deformable trailing edge flap in the aerodynamic load control of blades and found that it can effectively reduce the aerodynamic load fluctuation and the excessive loads that cause damage of blades. However, this method is more suitable for low‐speed conditions of horizontal axis wind turbines and large vertical axis wind turbines.…”

Section: Introductionmentioning

confidence: 99%

Influences of trailing edge split flap on the aerodynamic performance of vertical axis wind turbine

Zhang

et al. 2020

Energy Science & Engineering

View full text Add to dashboard Cite

To improve the performance of a 3.5 kW small H‐type vertical axis wind turbine (VAWT) with the airfoil of NACA0015, a design method for installing split flaps at the trailing edge of a blade is proposed. By solving the two‐dimensional URANS equations, the simulation of VAWTs is carried out. The influences of the length (10% c‐30% c), arrangement positions (90% c‐70% c), and deflection angles (10°‐30°) of the split flaps on the performance of VAWT are determined by orthogonal design when Reynolds number is 2 × 105 and 1 < TSR < 3. In accordance with the influence degrees of these parameters and adopting the maximum wind energy utilization ratio CPmax and the maximum efficient operating range Δλmax as research objectives, the optimum flap length is determined as 22% c, the optimum deflection angle is 10°, and the optimum arrangement position is 92% c. Further studies show that the CPmax is increased by 5.8% and its Δλmax is increased by 25.9% after installing split flaps. Meanwhile, split flaps can change the Kutta‐Joukowsky trailing edge boundary condition, which increases the flow circulation around the airfoil. Also, split flaps can increase the positive pressure difference in the upwind area and reduce the negative pressure difference in the downwind area, which significantly improves the aerodynamic performance of VAWTs.

show abstract

Effect of morphed trailing-edge flap on aerodynamic load control for a wind turbine blade section

Cited by 30 publications

References 36 publications

Review of Flow-Control Devices for Wind-Turbine Performance Enhancement

Review of Flow-Control Devices for Wind-Turbine Performance Enhancement

The Effect of a Flexible Blade for Load Alleviation in Wind Turbines

Influences of trailing edge split flap on the aerodynamic performance of vertical axis wind turbine

Contact Info

Product

Resources

About