Optimal Aero-Elastic Design of a Rotor with Bend-Twist Coupling

Publication: Research - peer-reviewConference article – Annual report year: 2018

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Passive 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.
Original languageEnglish
Article number042009
Book seriesJournal of Physics: Conference Series
Volume1037
Issue number4
Number of pages13
ISSN1742-6596
DOIs
StatePublished - 2018
EventTorque 2018 - Milan, Italy

Conference

ConferenceTorque 2018
LocationPOLIMI
CountryItaly
CityMilan
Period20/06/201822/06/2018
Internet address

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Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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