Optimal Aero-Elastic Design of a Rotor with Bend-Twist Coupling
Optimal Aero-Elastic Design of a Rotor with Bend-Twist Coupling
复制标题
弯扭联轴器转子的优化气动弹性设计
DOI：
10.1088/1742-6596/1037/4/042009
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Taeseong Kim
中科院分区：
文献类型：
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作者：
M. McWilliam;F. Zahle;Antariksh Dicholkar;D. Verelst;Taeseong Kim
被动弯扭耦合（BTC）可用于叶片，以减轻负载并产生更多的年发电量（AEP）。然而，BTC是固有的气动弹性，因此难以纳入设计与顺序设计过程。多学科设计优化（MDO）是克服这些挑战的一种有吸引力的方法。本文介绍了使用MDO转子设计软件HAWTOpt 2重新设计的100千瓦BTC转子。在初步设计阶段，MDO用于评估弹性BTC（即离轴纤维）和几何BTC（即扫描）之间的差异。这项工作发现，没有BTC的气动弹性设计优化能够实现16%的改善，然后与后掠角18%的改善和材料耦合17%的改善。由于离轴纤维的刚度降低，材料耦合设计更难以满足尖端偏转约束。几何BTC概念被选为最终设计。在附加制造约束的情况下重复设计优化。最终设计实现了12%的改进。
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.