Forced motion CFD simulation and load refinement evaluation of floating vertical-axis tidal current turbines

• Autorzy: Zhang Wanchao , Zhou Yujie , Wang Kai , Zhou Xiaoguo

Identyfikatory

DOI

10.2478/pomr-2020-0045

• Języki publikacji: EN

Abstrakty

EN

Simulation of the hydrodynamic performance of a floating current turbine in a combined wave and flow environment is important. In this paper, ANSYS-CFX software is used to analyse the hydrodynamic performance of a vertical-axis turbine with various influence factors such as tip speed ratio, pitching frequency and amplitude. Time-varying curves for thrust and lateral forces are fitted with the least squares method; the added mass and damping coefficients are refined to analyse the influence of the former factors. The simulation results demonstrate that, compared with nonpitching and rotating turbines under constant inflow, the time-varying load of rotating turbines with pitching exhibits an additional fluctuation. The pitching motion of the turbine has a positive effect on the power output. The fluctuation amplitudes of thrust and lateral force envelope curves have a positive correlation with the frequency and amplitude of the pitching motion and tip speed ratio, which is harmful to the turbine’s structural strength. The mean values of the forces are slightly affected by pitching frequencies and amplitudes, but positively proportional to the tip speed ratio of the turbine. Based upon the least squares method, the thrust and lateral force coefficients can be divided into three components, uniform load coefficient, added mass and damping coefficients, the middle one being significantly smaller than the other two. Damping force plays a more important role in the fluctuation of loads induced by pitching motion. These results can facilitate study of the motion response of floating vertical-axis tidal current turbine systems in waves.

Słowa kluczowe

EN

vertical-axis tidal current turbine; hydrodynamic loads; pitching motion; added mass; damping coefficients

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2020
• Tom: nr 3
• Strony: 40--49
• Opis fizyczny: Bibliogr. 20 poz. rys., tab

Twórcy

autor

Zhang Wanchao

• iangsu University of Science and Technology, No.2 Mengxi Road, 212000 Zhenjaing, China

autor

Zhou Yujie

• Jiangsu University of Science and Technology, Mengxi Road, 212000 Zhenjiang, China

autor

Wang Kai

• Wuhan Second Ship Design & Research Institute, 450 Zhongshan Road, 430064 Wuhan, China

autor

Zhou Xiaoguo

• Jiangsu University of Science and Technology, Mengxi Road, 212000 Zhenjiang, China

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).