海上浮式风力机叶片气动性能的数值模拟

Numerical simulation of aerodynamic characteristics of floating offshore wind turbine blades

该文采用滑移网格的方法,基于Open FOAM的瞬态求解器pimple Dy MFoam对OC4中的大型海上浮式风力机NREL 5MW叶片的气动性能进行了数值模拟。分别计算了不同风速(5 m/s、8 m/s和11 m/s)下风力机叶片的推力和扭矩,求得了叶片表面的极限流线分布、尾涡分布以及叶片表面不同截面处的压力系数分布。并将计算的结果与NREL的结果进行了对比分析,研究了不同风速下浮式风力机的受力及尾流场变化情况,可为今后大型海上风力机的设计与优化提供相关参考。

Using sliding mesh method, the aerodynamic performances of large-scale floating offshore wind turbine blades NREL 5MW of OC4 are simulated based on the transient solver pimpleDyMFoam in open-source software OpenFOAM. At the different wind speeds （5 m/s, 8 m/s and 11 m/s）, thrust and torque of blades are calculated. The limiting streamline distribution of blade surface, wake vortex and pressure coefficient distribution in different cross sections are also used to clarify the detailed flow filed information. The calculated results are compared with NREL results to study the forces and flow structure in different wind speeds, which hope to provide a reference for future large-scale offshore wind turbine design and optimization.