Cavitation limits on tidal turbine performance

被引:17
|
作者
Wimshurst, Aidan [1 ]
Vogel, Christopher [1 ]
Willden, Richard [1 ]
机构
[1] Univ Oxford, Dept Engn Sci, Parks Rd, Oxford OX1 3PJ, England
基金
英国工程与自然科学研究理事会;
关键词
Cavitation; Blockage; Spanwise flow; Safety margin; Tidal turbines; DESIGN; PREDICTION; BLOCKAGE; POWER;
D O I
10.1016/j.oceaneng.2018.01.060
中图分类号
U6 [水路运输]; P75 [海洋工程];
学科分类号
0814 ; 081505 ; 0824 ; 082401 ;
摘要
Blockage effects are currently not accounted for in cavitation analyses of tidal turbine rotors. At higher blockage ratios, rotors are more heavily loaded and have potentially stronger suction peaks, so cavitation inception is more likely. In this paper, blade resolved computations are used to carry out a cavitation analysis over a range of blockage ratios and tip-speed-ratios. Our analysis suggests that increasing the blockage ratio from 0.01 to 0.197 reduces the minimum static pressure head in the fluid by approximately 0.5 m. To mitigate this reduction, either the submersion depth of the rotor can be increased or the maximum permissible tip speed ratio reduced. However, reducing the maximum permissible tip speed ratio is shown to severely restrict the rotor thrust and power. Spanwise flow effects are shown to reduce the strength of the suction peak on the outboard blade sections, reducing the likelihood of cavitation inception. Blade element based methods are shown to inadequately account for spanwise flow effects and thus are overly-conservative. Hence, rotors designed with these methods could potentially be operated at higher tip-speed-ratios or reduced submersion depths.
引用
收藏
页码:223 / 233
页数:11
相关论文
共 50 条
  • [41] Impact of Environmental Turbulence on the Performance and Loadings of a Tidal Stream Turbine
    Pablo Ouro
    Thorsten Stoesser
    Flow, Turbulence and Combustion, 2019, 102 : 613 - 639
  • [42] DESIGN PROCEDURE TO OPTIMIZE THE PERFORMANCE OF A TIDAL CURRENT TURBINE BLADE
    Jo, Chul-Hee
    Lee, Kang-Hee
    Hwang, Su-Jin
    ENERGY AND SUSTAINABILITY VIII, 2017, 224 : 375 - 384
  • [43] Performance Evaluation of a Tidal Current Turbine with Bidirectional Symmetrical Foils
    Guo, Bin
    Wang, Dazheng
    Zhou, Xu
    Shi, Weichao
    Jing, Fengmei
    WATER, 2020, 12 (01)
  • [44] CFD Investigation of the Open Center on the Performance of a Tidal Current Turbine
    Barbarelli, Silvio
    Castiglion, Teresa
    Lo Zupone, Giacomo
    Bova, Sergio
    Yan, Jinyue
    RENEWABLE ENERGY INTEGRATION WITH MINI/MICROGRID, 2019, 159 : 28 - 33
  • [45] Performance Improvement of a Darrieus Tidal Turbine with Active Variable Pitch
    Delafin, Pierre-Luc
    Deniset, Francois
    Astolfi, Jacques Andre
    Hauville, Frederic
    ENERGIES, 2021, 14 (03)
  • [46] The effect of surface waves on the performance characteristics of a model tidal turbine
    Luznik, Luksa
    Flack, Karen A.
    Lust, Ethan E.
    Taylor, Katharin
    RENEWABLE ENERGY, 2013, 58 : 108 - 114
  • [47] The performance of a weir-mounted tidal turbine: An experimental investigation
    Verbeek, M. C.
    Labeur, R. J.
    Uijttewaal, W. S. J.
    RENEWABLE ENERGY, 2021, 168 : 64 - 75
  • [48] Fluid dynamic performance of a vertical axis turbine for tidal currents
    Yang, Bo
    Lawn, Chris
    RENEWABLE ENERGY, 2011, 36 (12) : 3355 - 3366
  • [49] The effect of tidal stream characteristic and mechanical support structure on horizontal axis tidal turbine performance
    Du, Min
    Wang, Haifeng
    Hou, Erhu
    Duan, Lei
    Wang, Bingzhen
    Zhou, Qingwei
    Li, Ye
    Bai, Yang
    Jiang, Bo
    OCEANS 2016 - SHANGHAI, 2016,
  • [50] THE EFFECT OF TIP LEAKAGE VORTEX ON CAVITATION PERFORMANCE IN AXIAL HYDRO TURBINE
    Masuda, Naoki
    Austen, Faris
    Maeda, Hideaki
    PROCEEDINGS OF THE ASME/JSME/KSME JOINT FLUIDS ENGINEERING CONFERENCE, 2015, VOL 1A, SYMPOSIA, PT 2, 2016,