A numerical study on dynamic characteristics of 5 MW floating wind turbine under wind-rain conditions. (15th October 2022)

• Record Type: Journal Article
• Authors: Wu, Song; Sun, Hanbing; Zheng, Xing
• Is Part Of: Ocean engineering. Volume 262(2022)
• Publication Date: 2022-10-15
• Subjects: Wind-rain load -- Eulerian multiphase model -- SRF -- Collision theory -- Aerodynamic performance; Ocean engineering -- Periodicals; Ocean engineering; Periodicals; 620.4162
• DOI: 10.1016/j.oceaneng.2022.112095
• Languages: English
• ISSNs: 0029-8018

Abstract

Abstract: For floating wind turbines, the interaction of wind and rain significantly affects the aerodynamic performance. In this paper, a hybrid method ESCM-WAR (Eulerian multiphase - Single rotating frame - Collision theory Method) is presented to address the dynamic characteristics of wind turbines under wind-rain conditions. In ESCM-WAR, the flow of wind and rain is modeled by Eulerian multiphase model, the rotational motion of wind turbines is simulated by single rotating frame, and the load caused by rain is calculated by collision theory. To verify the effectiveness of the proposed method, the results of rain-induced pressure and final rain velocity are compared with the Lagrangian particle tracking model, which shows good agreement and the error is less than 8%. Various cases related to the influence of wind speed, rotation speed, and rain intensity on the 5 MW wind turbine are numerically simulated. The results clearly show that the thrust and torque caused by the rain-induced load increase as the rain intensity increases. More importantly, based on the numerical results, an empirical formula is proposed to describe the relationship between the three influencing factors and the rain-induced load coefficient KF /KQ . The empirical formula can be used as a reference for the numerical simulation. This empirical formula can serve as a reference for load calculation at wind-rain conditions. Highlights: Simulate wind-rain combined conditions based on a new method (EM model). Realize the dynamic simulation of wind turbine rotation under wind-rain conditions. Realize the load calculation of the interaction between rain and structure.