INFLUENCE OF BLUNT TRAILING EDGE ON ENERGY HARVESTING CHARACTERISTICS OF FLAPPING AIRFOIL

被引：0

作者：

Zhang G. ^{[1
,2
]}

Sun X. ^{[1
,2
]}

机构：

[1] School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai

[2] Shanghai Key Laboratory of Power Energy in Multiphase Flow and Heat Transfer, Shanghai

来源：

Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2023年 / 44卷 / 05期

关键词：

blunt trailing edge; computational fluid dynamics; energy harvesting flapping airfoil; position; thickness; wind turbines;

D O I：

10.19912/j.0254-0096.tynxb.2022-0057

中图分类号：

学科分类号：

摘要：

The flapping airfoil energy harvester is a device that extracts energy from ocean currents through the heave and pitch motions. The numerical simulation of the energy harvesting characteristics of flapping wing with blunt trailing edge is carried out by means of computational fluid dynamics（CFD）. Influences of the initial position to symmetrically thicken the trailing edge，thickness of the blunt trailing edge and the airfoil thickness on the energy harvesting efficiency of the flapping airfoil were systemically investigated. The results show that there is an optimal ratio of the initial position to symmetrically thicken the trailing edge to the chord length of the airfoil p/c = 0.90 ，at which the largest increase in the efficiency of the flapping airfoil can be achieved. It is also found that the influence of the blunt trailing edge thickness on the performance of a flapping airfoil is more significant in the range of the middle and high reduction frequency. In general，the energy harvesting efficiency of the flapping airfoil increases at first and then decreases with the increase of the blunt trailing edge thickness. When the ratio of the blunt trailing edge thickness to the chord length of airfoil l/c = 0.02，the improvement influence of the energy harvesting efficiency of the blunt trailing edge flapping airfoil reaches the threshold. As the thickness of the airfoil gradually increases, the energy harvesting efficiency of blunt trailing flapping airfoil first increases and then decreases，and reaches its peak when the airfoil is NACA0030. © 2023 Science Press. All rights reserved.

引用

页码：457 / 465

页数：8

共 18 条

[1] XIAO Q, ZHU Q., A review on flow energy harvesters based on flapping foils［J］, Journal of fluids and structures, 46, pp. 174-191, (2014)
[2] YOUNG J, PLATZER M F., A review of progress and challenges in flapping foil power generation ［J］, Progress in aerospace sciences, 67, pp. 2-28, (2014)
[3] ZHANG L C, HUANG D G., Effect of Reynolds number on oscillating-airfoil power generator［J］, Acta energiae solaris sinica, 39, 3, pp. 643-650, (2018)
[4] MCKINNEY W，, DELAURIER J., Wingmill：an oscillating-wing windmill［J］, Journal of energy, 5, 2, pp. 109-115, (1981)
[5] XIAO Q, LIAO W, YANG S C，, Et al., How motion trajectory affects energy extraction performance of a biomimic energy generator with an oscillating foil［J］, Renewable energy, 37, 1, pp. 61-75, (2012)
[6] WANG Y, SUN X J，, HUANG D G，, Et al., Numerical investigation on energy extraction of flapping hydrofoils with different series foil shapes［J］, Energy, 112, pp. 1153-1168, (2016)
[7] LI W Z, WANG W Q, YAN Y., The effects of outline of the symmetrical flapping hydrofoil on energy harvesting performance［J］, Renewable energy, 162, pp. 624-638, (2020)
[8] ISMAIL M F，, VIJAYARAGHAVAN K., The effects of aerofoil profile modification on a vertical axis wind turbine performance［J］, Energy, 80, pp. 20-31, (2015)
[9] MICHNA J，, ROGOWSKI K，, BANGGA G，, Et al., Accuracy of the Gamma Re-Theta transition model for simulating the DU-91-W2-250 airfoil at high Reynolds numbers［J］, Energies, 14, 24, (2021)
[10] XU H R, YANG H, LIU C., Optimization of enlarging the thickness of airfoil’s trailing-edge for wind turbines［J］, Acta energiae solaris sinica, 36, 3, pp. 743-748, (2015)

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