CAJ | 학술논문

为了验证不同湍流模型对旋转风力机气动性能的预测精度，采用计算流体动力学软件ANSYS CFX 14.0，选用一方程 Spalart-Allmaras(S-A)模型和两方程剪切应力输运(shear stress transport，SST)模型2种湍流模型对非偏航工况3种不同来流风速下的MEXICO实验风力机进行数值计算。分析了计算网格数对计算结果的影响，然后把2种湍流模型计算得到的叶片表面压力系数、叶片所受气动载荷以及三维翼型特性与实验结果对比发现：2种湍流模型对附着流动情况都有较高的预测精度，SST模型在分离流动工况下对叶片吸力面压力系数预测精度高于 S-A 模型；且2种湍流模型对分离流动都有一定的预测精度，但对大分离流动而言SST模型的预测精度相对较高。
위료험증불동단류모형대선전풍력궤기동성능적예측정도，채용계산류체동역학연건ANSYS CFX 14.0，선용일방정 Spalart-Allmaras(S-A)모형화량방정전절응력수운(shear stress transport，SST)모형2충단류모형대비편항공황3충불동래류풍속하적MEXICO실험풍력궤진행수치계산。분석료계산망격수대계산결과적영향，연후파2충단류모형계산득도적협편표면압력계수、협편소수기동재하이급삼유익형특성여실험결과대비발현：2충단류모형대부착류동정황도유교고적예측정도，SST모형재분리류동공황하대협편흡력면압력계수예측정도고우 S-A 모형；차2충단류모형대분리류동도유일정적예측정도，단대대분리류동이언SST모형적예측정도상대교고。
In order to validate the aerodynamic prediction accuracy of different turbulence models for rotating wind turbines, the commercial CFD software ANSYS CFX 14.0 was used to predict the aerodynamic performance of MEXICO wind turbine at three different inflow velocities under non-yawed condition. Two turbulence models, which included one equation Spalart-Allmaras (S-A) model and two-equation SST model, were employed to analyze the effect of calculation grid number on the calculated power of MEXICO rotor. Then, by comparing the calculated data of pressure coefficients, loads applied on blade, lift and drag coefficients of airfoils with the experimental data, this paper finds that the results calculated by two turbulence models show good agreement with the relevant experimental results under attached flow condition, SST model gives more accurate prediction about the pressure coefficients on suction side of blades under separated flow condition. By using both S-A and SST turbulence models to predict the performance of MEXICO wind turbine, certain accuracy can be obtained when flow separates, while SST model has higher prediction precision than S-A model under large flow separation condition.