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为提高多段翼型的网格生成效率和数值模拟精度,发展了一套自适应混合笛卡尔网格(AHCG)生成方法和基于有限体积方法的雷诺数平均Navier-Stokes(RANS)的数值求解技术。混合笛卡尔网格由围绕物体几何外形的贴体结构网格和填充流场其他区域的笛卡尔网格构成,两套网格之间的信息传递由“贡献单元”提供,且“贡献单元”由基于ADT(Alternating digital tree)技术的搜寻方法获得。为更准确地捕捉流场信息,采用了基于流场特征的网格自适应技术。数值模拟结果显示,AHCG方法能够准确且高效地模拟高升力多段翼型绕流问题。
In order to improve the mesh generation efficiency and numerical simulation accuracy of multi-segment airfoils, a set of adaptive hybrid Cartesian grid (AHCG) generation methods and a Reynolds-averaged Navier-Stokes (RANS) numerical solution based on the finite volume method . The hybrid Cartesian grid consists of a body-fitted grid surrounding the geometry of the object and a Cartesian grid filling the rest of the flow field. The information transfer between the two grids is provided by “Contribution Unit ” and Contribution Unit "is obtained from the search method based on the Alternating Digital Tree (ADT) technology. In order to more accurately capture the flow field information, grid-based adaptive technology based on flow field characteristics is used. The numerical simulation results show that the AHCG method can accurately and efficiently simulate the flow around a multi-section airfoil with high lift.