Turbine design dependency to turbulence: An experimental study of three scaled tidal turbines

OCEAN ENGINEERING

卷:234

Article

Slama, Myriam¹  Pinon, Gregory¹  El Hadi, Charifa¹  Togneri, Michael²  Gaurier, Benoit³  Germain, Gregory³  Facq, Jean-Valery³  Nuno, Jose⁴  Mansilla, Pablo⁴  Nicolas, Erwann⁵  Marcille, Julie⁵  Pacheco, Andre⁶ 

[1] Normandie Univ, UNILEHAVRE, UMR 6294 CNRS, LOMC, F-76600 Le Havre, France

[2] Swansea Univ, Energy & Environm Res Grp, Bay Campus, Swansea SA1 8EN, W Glam, Wales

[3] IFREMER, 150 Quai Gambetta,BP 699, F-62321 Boulogne Sur Mer, France

[4] Magallanes Renovables, Prego Montaos 7, Redondela 36800, Spain

[5] Sabella SAS, 11 Rue Felix Le Dantec, F-29000 Quimper, France

[6] Univ Algarve, Edificio 7,Campus Gambelas, P-8005139 Faro, Portugal

关键词: Marine current turbine;    Performance;    Turbulence;    Tank testing;    Coherence;    Spectral analysis;   

DOI  :  10.1016/j.oceaneng.2021.109035

来源: Elsevier

【 摘 要 】

In this paper the turbulence effects are studied for three rotors mounted on the same instrumented hub. Two scaled models of industrial turbines and one open-geometry turbine are considered. The turbulence characteristics are obtained from 2D Laser Doppler Velocimeter measurements and the turbine behaviour is analysed from thrust and torque measurements. Three turbulence intensities and a large range of tip speed ratios and flow velocities are considered. The results are anonymised in order to ensure confidentiality. The rotors have different blade profiles, blade numbers and solidity. The rotor design largely modifies the mean power and thrust coefficients. The turbulence intensity only slightly changes these results but has a larger influence on the fluctuating loads than the different rotor designs. The spectral analysis of the rotor torque and thrust shows that, at low frequencies the load variations are correlated to those of the flow velocity with some differences due to the turbulence intensity levels. The coherences between the loads and the velocity seem to be not affected by the rotor type. At high frequencies, the load variations are correlated to the speed control unit of the scaled model and the rotor design has an impact on the rotational speed and loads coherences.

【 授权许可】

Free