Article, 2024

Flutter limit optimization of offshore wind turbine blades considering different control and structural parameters

Ocean Engineering, ISSN 1873-5258, 0029-8018, Volume 310, Page 118558, 10.1016/j.oceaneng.2024.118558

Contributors

Qian, Xiaohang [1] Zhang, Baoxu [2] Gao, Zhiteng (Corresponding author) [3] Wang, Tong-Guang [2] Zhang, Lijun [4] Li, Ye [1] [5] [6]

Affiliations

  1. [1] Southern University of Science and Technology
    2. [NORA names: China; Asia, East];
  2. [2] Nanjing University of Aeronautics and Astronautics
    3. [NORA names: China; Asia, East];
  3. [3] Shantou University
    4. [NORA names: China; Asia, East];
  4. [4] Shanghai Jiao Tong University
    5. [NORA names: China; Asia, East];
  5. [5] Technical University of Denmark
    6. [NORA names: DTU Technical University of Denmark; University; Denmark; Europe, EU; Nordic; OECD];

Abstract

The aeroelastic stability of highly flexible blades under complex sea conditions is one of the key issues restricting the reliability and efficiency growth of offshore wind turbines. This work takes the IEA-15 MW offshore wind turbine as the research object and uses the geometrically exact beam theory for structural analysis. For the flutter analysis, the blade element momentum theory is employed in conjunction with the structural model. These calculation methods proved to be valid for calculation result compared with other numerical methods and experimental results. The effects of control and structural properties on the flutter performance of the 15 MW wind turbine blades are investigated by considering the pitch angle, yaw angle, torsional stiffness and structural damping. It is numerically shown that the flutter speed can increase by 15.56% by adjusting pitch angle (from 0° to 5°) and the flutter performance can be improved by setting a yaw angle of 10 degrees. And the results of structural characteristics demonstrated that the flutter performance of highly flexible offshore blades can be improved by properly increasing the torsional stiffness and edgewise structural damping.

Keywords

MW offshore wind turbine, MW wind turbine blade, aeroelastic stability, analysis, angle, beam theory, blade, blade element momentum theory, calculated results, calculation method, calculations, characteristics, complex sea conditions, conditions, conjunction, control, damping, degree, edgewise, effect, effectiveness of control, efficiency, efficient growth, experimental results, flutter, flutter analysis, flutter performance, flutter speed, geometrically, geometrically exact beam theory, growth, issues, method, model, momentum theory, numerical method, objective, offshore wind turbine blades, offshore wind turbines, parameters, performance, pitch, pitch angle, properties, reliability, research, research object, results, results of structure characteristics, sea conditions, speed, stability, stiffness, structural analysis, structural characteristics, structural damping, structural model, structural parameters, structural properties, theory, torsional stiffness, turbine, turbine blades, wind turbine blades, wind turbines, yaw, yaw angle

Funders

  • National Natural Science Foundation of China
  • China Postdoctoral Science Foundation
  • Ministry of Science and Technology of the People's Republic of China

Data Provider: Digital Science

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