中文摘要：

致动模型是一种较新的CFD计算模型,通过在N-S方程添加源项的形式模拟叶片对流场的作用,减少了网格数量和计算时间。在OpenFoam平台上对比了两种风力机尾流预测模型,包括PISO求解的致动线模型和多重参考稳态求解的CFD实体模型。进而数值研究了NREL 5 MW风力机在均匀来流中的近尾流区流场特性,结合大涡模型和致动线模型,通过对不同风速下尾流的流场特性分析,包括涡结构、尾流速度亏损、拟涡能等,验证了致动线模型的准确性,为近场尾流研究提供有利参考。

英文摘要：

The actuator model is one kind of newly CFD calculation model,by adding equivalent forces to represent the rotor while the surrounding flow field is governed by a full set of N-S equations,therefore,the grid resolution and computing time can be significantly reduced.This paper compares two methods for predicting wind turbine performance,with the full CFD calculations of a traditional Blade Element Momentum based method at the low complexity,including full CFD physical model with MRF solver and actuator line model using the PISO solver,which based on the OpenFoam platform.The analytical methods applied to a model of the NREL 5 MW horizontal axis three-vaned rotor.The near wake of a wind turbine operating in a uniform inflow at various wind speed is simulated using a numerical method,which combines large eddy simulations with an actuator line technique,analyzed deficit of wake velocity,vortex structures,enstrophy and verified the precision of actuator line model,facilitating detailed studies of basic features of both the near wake.