McWilliam_2018_J._Phys.__Conf._Ser._1037_042009.pdf (745.29 kB)
Optimal aero-elastic design of a rotor with bend-twist coupling
journal contribution
posted on 2019-04-12, 15:33 authored by Michael K. McWilliam, Frederik Zahle, Antariksh Dicholkar, David Verelst, Taeseong KimPassive Bend-Twist Coupling (BTC) can be used in blades to alleviate loads and generate more Annual Energy Production (AEP). However, BTC is inherently aero-elastic, thus difficult to incorporate into the design with sequential design process. Multi-disciplinary Design Optimization (MDO) is an attractive approach for overcoming these challenges. This paper presents the re-design of a 100kW BTC rotor using the MDO rotor design package HAWTOpt2. In the preliminary design phase, MDO was used to assess the differences between elastic BTC (i.e. off-axis fibers) and geometric BTC (i.e. sweep). This work found that aero-elastic design optimization without BTC was able to achieve a 16% improvement, then with sweep a 18% improvement and with material coupling a 17% improvement. Due to the reduced stiffness of off-axis fibers, material coupled designs had more difficulty satisfying the tip deflection constraint. The geometric BTC concept was chosen for the final design. The design optimization was repeated with additional manufacturing constraints. The final design achieved a 12% improvement.
History
School
- Mechanical, Electrical and Manufacturing Engineering
Published in
Journal of Physics: Conference SeriesVolume
1037Pages
042009 - 042009Citation
MCWILLIAM, M.K. ... et al, 2018. Optimal aero-elastic design of a rotor with bend-twist coupling. Journal of Physics: Conference Series, 1037, 042009.Publisher
IOP PublishingVersion
- VoR (Version of Record)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution 3.0 Unported (CC BY 3.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/by/3.0/Publication date
2018Notes
This is an Open Access article. It is published by IOP Publishing under the Creative Commons Attribution 3.0 Unported Licence (CC BY). Full details of this licence are available: https://creativecommons.org/licenses/by/3.0/ISSN
1742-6588eISSN
1742-6596Publisher version
Language
- en