In order to continuously develop the special airfoil for wind turbine and further improve the energy efficiency of wind turbine, based on the bionic airfoil Dol-Rot 24° that was proposed by the streamline contour of the Phocoenoides Dalli, another novel bionic airfoil is constructed combined with the lever movement shape of the dolphin skeleton, and the airfoil is named Dol-Rot 24°-2. For the cross section of NREL phase VI horizontal axis wind turbine blade (S809 airfoil), Dol-Rot 24°, and Dol-Rot 24°-2 are adopted and numerically simulated to quantitatively analyze from both aspects of aerodynamic performance and noise characteristics. Using the above two novel airfoils profiles, two 3D bionic blades named Dol-Blade-1 and Dol-Blade-2 suitable for NREL phase VI HAWT are established. The results show that: compared with S809 airfoil, Dol-Rot 24°-2 airfoil can greatly improve the lift coefficient, while Dol-Rot 24° airfoil can more effectively inhibit the flow separation on the suction surface. In terms of noise characteristics, compared with S809 airfoil, the noise of the two types of dolphin airfoils does not increase significantly. In addition, Dol-Blade-1 can comprehensively improve the low-speed shaft torque of the blade, while the load of the wind turbine hardly changes. The low-speed shaft torque of Dol-Blade-2 is even better than that of Dol-Blade-1. However, the blade root bending moment of Dol-Blade-2 increases obviously, which inevitably increases the load of the wind turbine. In this paper, the new bionic method is proposed to improve the wind energy utilization of wind turbine on the premise of strictly controlling the aerodynamic noise and load level of blade. The research results of this paper can provide a reference for the optimization of energy efficiency and noise research of NREL phase VI HAWT.

为了不断开发风力机专用翼型，进一步提高风力机能效，在Phocoenoides Dalli流线轮廓提出的仿生翼型Dol-Rot 24°的基础上，结合构建了另一种新型仿生翼型。具有海豚骨架的杠杆运动形状，翼型命名为Dol-Rot 24°-2。对于NREL六相水平轴风力机叶片（S809翼型）截面，采用Dol-Rot 24°和Dol-Rot 24°-2进行数值模拟，从气动性能和噪声特性两方面进行定量分析。利用上述两种新型翼型剖面，建立了适用于NREL VI HAWT的两种3D仿生叶片，分别命名为Dol-Blade-1和Dol-Blade-2。结果表明：与S809翼型相比，Dol-Rot 24°-2翼型可以大大提高升力系数，而Dol-Rot 24°翼型可以更有效地抑制吸力面上的气流分离。在噪声特性方面，与S809翼型相比，这两种海豚翼型的噪声并没有明显增加。此外，Dol-Blade-1可以全面提高叶片的低速轴扭矩，同时风力发电机的负载几乎没有变化。Dol-Blade-2 的低速轴扭矩甚至优于 Dol-Blade-1。但Dol-Blade-2叶片根部弯矩明显增大，不可避免地增加了风机的载荷。本文提出了一种新的仿生方法，在严格控制叶片气动噪声和载荷水平的前提下，提高风力机的风能利用率。