Unsteady effects of a winglet on the performance of horizontal-axis tidal turbine

被引：7
作者：
Zhang, Dahai [1 ,2 ]
Liu, Di [1 ,2 ]
Liu, Xiaodong [1 ]
Xu, Haiyang [1 ]
Wang, Yuankui [1 ,3 ]
Bi, Ran [4 ]
Qian, Peng [1 ,2 ,5 ]
机构：
[1] Zhejiang Univ, Ocean Coll, Zhoushan 316021, Peoples R China
[2] Zhejiang Univ, Hainan Inst, Sanya 572025, Peoples R China
[3] China State Shipbuilding Corp Ltd, Kunming Branch, Res Inst 705, Kunming 650032, Peoples R China
[4] China Elect Power Res Inst, Beijing 100192, Peoples R China
[5] Zhejiang Univ, Inst Ocean Technol, Ocean Coll, Hangzhou, Peoples R China
来源：
RENEWABLE ENERGY | 2024年 / 225卷
基金：
中国国家自然科学基金;
关键词：
Winglet; Tidal turbine; Unsteady effects; Tidal current energy; Computational fluid dynamics; Flume experiment; TECHNOLOGIES; TURBULENCE; DESIGN;
D O I：
10.1016/j.renene.2024.120334
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A tip winglet can reduce the induced drag and the load fluctuation of a blade, considerably improving the hydrodynamic performance of a tidal turbine. Up to now, there are fewer studies on the unsteady effects of winglets, which limits the application of this design scheme. In this paper, a tidal turbine model is established based on computational fluid dynamics (CFD) and verified by a flume experiment. Then, unsteady effects on the turbine blade are analyzed considering different winglet lengths and cant angles. According to the study, the blade performance is optimal when the winglet cant angle is 45 degrees, with about 11% efficiency improvement and about 8% increase in axial force; as the winglet length increases, the performance tends to further improve. In addition, this study demonstrates that the reason why a winglet can reduce blade load fluctuations is that the winglet takes the tip vortex generation position away from the blade rotation plane, instead of reducing the tip vortex intensity.
引用
收藏
页数：14
相关论文
共 45 条
  • [1] Turbulent flow and loading on a tidal stream turbine by LES and RANS
    Afgan, I.
    McNaughton, J.
    Rolfo, S.
    Apsley, D. D.
    Stallard, T.
    Stansby, P.
    [J]. INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, 2013, 43 : 96 - 108
  • [2] airfuel, US
  • [3] Optimum performance of a horizontal axis tidal current turbine: A numerical parametric study and experimental validation
    Alipour, Ramin
    Alipour, Roozbeh
    Fardian, Farhad
    Tahan, Mohammad Hossein
    [J]. ENERGY CONVERSION AND MANAGEMENT, 2022, 258
  • [4] [Anonymous], Compute grid spacing for a given y+
  • [5] [Anonymous], 2017, ANSYS FLUENT Theory Guide
  • [6] Power and thrust measurements of marine current turbines under various hydrodynamic flow conditions in a cavitation tunnel and a towing tank
    Bahaj, A. S.
    Molland, A. F.
    Chaplin, J. R.
    Batten, W. M. J.
    [J]. RENEWABLE ENERGY, 2007, 32 (03) : 407 - 426
  • [7] Numerical study of the flow field around hydrokinetic turbines with winglets on the blades
    Barbaric, Marina
    Batistic, Ivan
    Guzovic, Zvonimir
    [J]. RENEWABLE ENERGY, 2022, 192 : 692 - 704
  • [8] BP, 2016, STAT REV WORLD EN 20
  • [9] Development and Research Status of Tidal Current Power Generation Systems in China
    Chen, Hao
    Li, Qi
    Benbouzid, Mohamed
    Han, Jingang
    Ait-Ahmed, Nadia
    [J]. JOURNAL OF MARINE SCIENCE AND ENGINEERING, 2021, 9 (11)
  • [10] Small cross-flow turbine:Design and testing in high blockage conditions
    Espina-Valdes, Rodolfo
    Fernandez-Jimenez, Aitor
    Fernandez Francos, Joaquin
    Blanco Marigorta, Eduardo
    Alvarez-Alvarez, Eduardo
    [J]. ENERGY CONVERSION AND MANAGEMENT, 2020, 213
12345