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大型风力机风轮气动设计和性能分析需要更加准确、快速的预估方法。风力机风轮三维流场具有低Mach数、高Reynolds数的特点,该文把风轮流场简化为有势流场,将叶片表面和尾迹视为有势流场的边界,采用速度势方程作为流动控制方程,使用面元法进行求解,建立了风力机风轮三维气动性能数值计算的模型,并编制了计算程序。同时,还建立了适用于水平轴风力机的尾迹迭代求解方法,考虑了表面摩擦阻力对风轮转矩和推力的影响,提高了计算精度。与实验结果对比证明,该方法具有很好的计算准确性,为进一步研究常规运行工况下的风力机风轮气动性能,特别是大型变速变桨风力机气动性能提供了一个准确、快速的预估方法。
Large-scale wind turbine rotor aerodynamic design and performance analysis needs more accurate and rapid estimation method. The three-dimensional flow field of a wind turbine wind turbine has the characteristics of low Mach number and high Reynolds number. This paper simplifies the rotor flow field into a potential flow field, treats the blade surface and wake as the boundary of the potential flow field, uses the velocity potential equation Flow control equations were solved by using the bifurcation method. The numerical model of three-dimensional aerodynamic performance of wind turbine wind turbine was established, and the calculation program was compiled. At the same time, an iterative solution to the wake of a horizontal axis wind turbine is also established. The influence of the surface friction resistance on the rotor torque and thrust is considered, and the calculation accuracy is improved. Compared with the experimental results, the method has good calculation accuracy, and provides an accurate and rapid pre-test for further studying the aerodynamic performance of the wind turbine wind turbine under normal operating conditions, especially the aerodynamic performance of large variable speed pitch wind turbines. Estimation method.