【摘要】 对几个具有代表性的风力机常用翼型的几何特性和气动特性进行分析研究,详细探讨了各种翼型的前缘粗糙度敏感特性情况。基于一种新的翼型几何形状表征形式,以设计攻角工况下光滑条件和粗糙条件下的升阻比加权值为目标,优化设计得到了一种相对厚度为24.7%的风力机专用新翼型。对新翼型在主要工作攻角范围的升力特性、阻力特性及升阻比特性进行了研究,并详细分析了新翼型在不同工况下的气动特性情况,研究结果表明:新翼型具有低前缘粗糙度敏感性和低湍流敏感性;在设计和非设计运行工况下都具有很好的气动性能;雷诺数的升高和三维旋转效应对风轮叶片新翼型的气动特性具有促进作用。更多还原

【Abstract】 In this paper the geometric properties and aerodynamic performance for some typical wind turbine airfoils are reviewed and then the leading edge roughness effects for every airfoil are discussed in detail.Based on a new airfoil representing function,assigns the weighted value of lift-drag ratio on smooth and roughness working condition as the optimum objective function,a new wind turbine dedicated airfoil with the thickness of 24.7% has been designed.The lift,drag and lift-drag ratio performances have been studied on the new airfoil.Different working condition characteristics of this new airfoil have also been analyzed.The new airfoil was found to be very insensitive to leading edge roughness and turbulent flow.And the airfoil showed a very good on-design and off-design operational condition characteristics.The high Reynolds number and three-dimensional rotation effects can improve the performance of the new wind turbine airfoil.更多还原