BRIEF RESEARCH REPORT article
Front. Energy Res.
Sec. Wind Energy
Volume 13 - 2025 | doi: 10.3389/fenrg.2025.1586142
Analysis of flutter characteristics of ultra-large horizontal axis wind turbine blades at low rotor speed
Provisionally accepted
- 1China Three Gorges Corporation, Wuhan, Hebei Province, China
- 2Shanghai Jiao Tong University, Shanghai, China
- 3Shanghai Non-carbon Energy Conversion and Utilization Institute, Shanghai, China
Select one of your emails
You have multiple emails registered with Frontiers:
Notify me on publication
Please enter your email address:
If you already have an account, please login
You don't have a Frontiers account ? You can register here
As the blade size of wind turbine ascends, the potential flutter issue has become a crucial factor in the safety design of wind turbines. The high flexibility and strong nonlinearity result in the possibility of flutter for ultra-large horizontal axis wind turbine blades even at low rotor speed. With the IEA 15MW wind turbine blade as the research object, the dynamic model of the wind turbine blade aeroelastic system was established. Research on the aeroelastic response during flutter at low rotational speeds and the multi-degree-of-freedom coupling characteristics therein was conducted. The results indicate that under the operating conditions of low rotational speed and high wind speed, the wind turbine blade can undergo multi-degree-of-freedom coupled flutter involving flapwiseedgewise-torsional coupling. Only the edgewise-torsional coupling characteristics are presented in the frequency domain. However, from the energy perspective, it is found that the flutter is maintained by the combined work of the aerodynamic forces in all three degrees of freedom. Different blade segments contribute differently, and the middle section and the tip of the blade make the main contribution. There exists a distinct coupling phenomenon in the development of the instantaneous aerodynamic power of each degree of freedom.
Keywords: Wind Turbine, aeroelasticity, Multi-degree-of-freedom coupling, flutter, Blade element momentum theory
Received: 02 Mar 2025; Accepted: 21 Apr 2025.
Copyright: © 2025 Ma, Qin, Zhang, Shen and Wang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Xin Shen, Shanghai Jiao Tong University, Shanghai, China
Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.