中文摘要：

采用商业软件Fluent针对网格疏密程度和湍流模型对利用柯恩达效应的环量控制翼型二维流场的影响进行了研究，并以实验结果为参照，进行了对比分析。结果表明：网格的疏密和湍流模型的选取对流场细节的捕捉和性能参数的预测有显著影响。在此基础上研究了具有圆、椭圆和对数螺线形式柯恩达表面的环量控制翼型性能的变化，初步探讨了射流层附壁与高曲率表面特征参数的关联。

英文摘要：

The grid independence and turbulence model applicability were studied first for a circulation control airfoil in which the Coanda effect was used in comparison with the experimental data. The numerical results indicate that the grid density and the selected turbulence model have a significant effect on the details of the flow field and the prediction of the performance parameters. Then the influence of the different Coanda surface shapes including the circle, elliptical and logarithmic spiral TE geometries on the performance of the circulation control airfoil were investigated. The relation between the jet attachment and the characteristic parameters of the Coanda surfaces with high curvature was discussed.