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首页> 外文期刊>Journal of Mechanical Science and Technology >Design optimization of a wind turbine blade to reduce the fluctuating unsteady aerodynamic load in turbulent wind
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Design optimization of a wind turbine blade to reduce the fluctuating unsteady aerodynamic load in turbulent wind

机译：优化风轮机叶片的设计，以减少湍流中波动的气动不稳定载荷

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Design optimization of the wind turbine of a NREL 1.5-MW HAWT blade was studied to minimize the fluctuation of the bending moment of the blade in turbulent wind. In order to analyze the unsteady aerodynamic load of a wind turbine, FAST code was used as the analysis code. To consider turbulent wind as the wind input model in FAST, TurbSim was used as a turbulent wind simulator. For effective geometrical representation of the aerodynamic shape of a wind turbine blade, the shape modeling function was used to represent the chord length and twist angle. The fluctuation of the out-of-plane bending moment at the blade root was minimized by maintaining the required power of the wind turbine. Through the redistribution of the section force in the radial direction between both the primary and tip regions, the magnitude of the fluctuation of the out-of-plane bending moment was reduced by about 20%, and the rated power of 1.5-MW was maintained. The local angles of attack for the optimized blade were near the point of the maximum lift-to-drag ratio in the primary and tip regions compared to the baseline blade. The fluctuating unsteady aerodynamic load in the optimized blade was reduced within the operating range of the wind speed. With the optimized blade shape, the wind turbine can be operated with decreased fluctuating aerodynamic loads and have a longer life in turbulent wind.
机译：研究了NREL 1.5兆瓦HAWT叶片的风力涡轮机的设计优化，以最大程度减小湍流中叶片弯曲力矩的波动。为了分析风力涡轮机的非稳态气动载荷，使用FAST代码作为分析代码。为了将湍流风作为FAST中的风输入模型，TurbSim被用作湍流风模拟器。为了有效地表达风力涡轮机叶片的空气动力学形状，使用形状建模功能来表示弦长和扭转角。通过保持风力涡轮机所需的功率，可将叶片根部的平面外弯曲力矩的波动降至最低。通过在主区域和尖端区域之间在径向上重新分配截面力，平面外弯曲力矩的波动幅度减小了约20％，并保持了1.5兆瓦的额定功率。与基准叶片相比，优化叶片的局部攻角在主要区域和叶尖区域接近最大升阻比的点。在风速的运行范围内，优化叶片中波动的空气动力学负荷降低了。通过优化的叶片形状，风力涡轮机可以在减少的波动空气动力负载下运行，并且在湍流中具有更长的使用寿命。

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