CAJ | 학술논문

大型风力机叶片气动外形设计时,不仅应考虑气动外形参数的优化,还应该考虑参数优化后的运行特性,才能为风力机实际控制提供依据.为此,提出一种叶片气动外形及其运行特性设计优化方法.该方法首先建立叶片翼型分布、弦长分布和扭角分布等气动外形参数控制方程,基于叶素-动量理论分析各参数变化对风轮功率的影响.在满足额定功率条件下,以减小所需额定风速为目标进行优化求解,求解过程中考虑初始桨距角的影响.针对优化后的风轮,设计了风轮转矩-转速关系曲线,分析了风轮运行特性.最后,采用计算流体动力学方法佐证了设计结果的正确性.
대형풍력궤협편기동외형설계시,불부응고필기동외형삼수적우화,환응해고필삼수우화후적운행특성,재능위풍력궤실제공제제공의거.위차,제출일충협편기동외형급기운행특성설계우화방법.해방법수선건립협편익형분포、현장분포화뉴각분포등기동외형삼수공제방정,기우협소-동량이론분석각삼수변화대풍륜공솔적영향.재만족액정공솔조건하,이감소소수액정풍속위목표진행우화구해,구해과정중고필초시장거각적영향.침대우화후적풍륜,설계료풍륜전구-전속관계곡선,분석료풍륜운행특성.최후,채용계산류체동역학방법좌증료설계결과적정학성.
When designing the aerodynamic shape parameter of large scale wind turbine blade, both the aerodynamic shape parameter optimization and the operating characteristics should be considered because the operating characteristics are the control basis for wind turbines. A novel aerodynamic shape and operating characteristic optimization design method for the blade is proposed. The control equations of airfoil distribution, chord length distribution and twist angle distribution are constructed. The influences of various parameters on the wind rotor power are analyzed based on the blade element momentum theory (BEM). The optimization target is to reduce the rated wind speed while the rated power is constant. In the optimization process, the influence of the initial pitch angle is considered. Aiming at the optimized wind rotor, the relationship curve between the torque and the rotational speed is designed, the running characteristics are analyzed. Finally, the correctness of the design results is verified by using the computational fluid dynamics (CFD).