为在不提高目标函数维度的前提下,满足实际运行中风力机翼型对于范围攻角综合性能气动性能和设计工况点气动性能兼优的设计需求,提出一种耦合混沌映射及动态协同机制的翼型优化方法。通过Bezier曲线构建翼型几何参数化模型,引入改进的Logistic-Tent混沌映射提高设计空间全局搜索能力,以提升翼型升阻比为设计目标,将动态协同函数嵌入自适应多目标算法,可实现翼型在攻角范围内的气动性能、设计工况点气动性能的优化。经CFD数值验证,优化后翼型在范围攻角内的升力系数平均提升4.6%、7.0%,升阻比平均提升4.2%、7.4%;设计点升阻比提升7.53%、9.19%,证明了方法的可行性。
Abstract
In order to meet the design requirements of wind turbine airfoils in actual operation for both the comprehensive performance aerodynamic performance of the range angle of attack and the aerodynamic performance of the design working conditions without increasing the dimension of the objective function, an airfoil optimization method coupled with chaotic mapping and dynamic cooperation mechanism is proposed. The Bezier curve constructs the geometrical parametric model of the airfoil, the improved Logistic-Tent chaotic mapping applies to enhance the global searching ability of the design space, and the dynamic cooperation function is embedded in the adaptive multi-objective algorithm to improve the lift-to-drag ratio of the airfoil, to realize the parallel optimization of the comprehensive aerodynamic performance of the airfoil for the range of angle-of-attack and the aerodynamic performance of the design working condition point. After CFD numerical validation, the lift coefficient of the optimized airfoil in the range angle of attack is improved by 4.6% and 7.0% on average, the lift-to-drag ratio is improved by 4.2% and 7.4% on average, and the lift-to-drag ratio of the design point is improved by 7.53% and 9.19%, which proves the feasibility of the method.
关键词
风力机 /
翼型 /
升阻比 /
气动性能 /
翼型优化 /
混沌映射
Key words
wind turbines /
airfoils /
lift drag ratio /
aerodynamic performance /
airfoil optimization /
chaotic map
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基金
国家自然科学基金（51966014）; 内蒙古自治区科技计划（2021GG0436）; 内蒙古自治区自然科学基金（2023MS05003）; 内蒙古自治区高等学校青年科技英才支持项目（NJYT23021）
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