Session: 09-01-09 Wind Energy: Moorings 1

Paper Number: 124566

124566 - Study on Wind Vane Effect of a Single-Point Moored Floating Offshore Wind Turbine 

Affected by extreme loads, structural fatigue and other factors, yaw system failures of offshore wind turbine are frequent, making floating wind turbine operation and maintenance costs high. Combining single-point mooring technology with floating offshore wind turbines is an effective solution. However, the dynamic response characteristics of single-point moored floating offshore wind turbines (SPM-FOWT), especially the wind vane effect under misaligned wind and wave condition, are still unknown. In this paper, a high-precision downwind SPM-FOWT model is constructed by the in-house offshore floating wind turbine aero-hydro-elastic-servo coupling software, and then the spatial arrangement of the single-point mooring device is investigated in detail for its influence law on a SPM-FOWT. It is found that the arrangement position of the single-point mooring device has a significant effect on the wind dynamic characteristics of the floating wind turbine, but there is no obvious difference in the influence on the balance position of the yaw angle of the platform. In addition, the effects of wind, wave, and current loads on the wind-to-wind performance of the SPM-FOWT are also investigated, especially the wind vane effect under misaligned wind and wave condition. It is found that the angle to the wind of the SPM-FOWT is biased, which is affected by the comprehensive influence of wind, wave and current direction. In view of this, the method of deflector tower is proposed to enhance the performance of SPM-FOWT against wind, and finally a 1:50 scaled-down model test is performed for the relevant validation and analysis.

Presenting Author: Jiahao Chen Sun Yat-sen University

Presenting Author Biography: Jiahao Chen, graduated from Shanghai Jiao Tong University with a Ph.D. in Naval Architecture and Ocean Engineering, and has been engaged in postdoctoral research in Guangdong Electric Power Design and Research Institute of China Energy Construction Group, offshore wind structure senior engineer. Since March 2023, he has joined the School of Ocean Engineering and Technology of Sun Yat-sen University, an assistant professor of the "Hundred Talents Program" of Sun Yat-sen University, a master's supervisor, and an industry supervisor for doctoral students of Shanghai Jiao Tong University. He has been engaged in the research of offshore wind power for a long time, including wind turbine structure design optimization, shallow water mooring design, wind farm wake characteristics, multi-field coupling dynamics of offshore floating wind turbines, and artificial intelligence algorithms in offshore wind turbine dynamics modeling and predictive analysis.

Authors:

Jiahao Chen Sun Yat-sen University
Yifan Gao Sun Yat-sen University
Kai Wang Sun Yat-sen University