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Automated Mesh Generation and Solution Analysis of Arbitrary Airfoil Geometries

机译:自动网格生成和任意翼型几何形状的解决方案分析

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Two-dimensional airfoil tables play an important role in providing data for lower fidelity aerodynamic models. While this data is available for certain configurations, it may be necessary to model novel airfoil configurations. Existing rapid-analysis tools are limited to simple geometries and may make physical assumptions which do not hold for all flow conditions. Full CFD simulations typically require an expert user to spend considerable time meshing the airfoil. Handling multi-element airfoils using overset meshes introduces interpolation errors. The current work couples a strand/advancing front mesh generator in the near-body regions to an off-body unstructured mesh, to create a single mesh for the entire flow field. User effort is reduced by offering default meshing parameters based on best practices. The novelty of this method lies in the ability to identify line-structures in unstructured meshes, which is coupled to a Hamiltonian strand solver to compute the flow, using the full unsteady Navier-Stokes equations including a laminar/turbulent boundary layer transition model. Additionally, this solver can be used to run a large number of cases to generate airfoil tables and quantify effects of measurement uncertainty.
机译:二维翼型表在提供较低保真空气动力学模型的数据方面发挥着重要作用。虽然该数据可用于某些配置,但可能需要建模新型翼型配置。现有的快速分析工具仅限于简单的几何形状,并且可以使不适合所有流动条件的物理假设。完整的CFD模拟通常需要专家用户花费大量时间啮合翼型。使用潜水网格处理多元素翼型,引入了插值误差。目前的工作将围绕近端区域的股线/推进前网格发生器耦合到偏压非结构化网,以为整个流场创建单个网格。通过基于最佳实践提供默认的网格化参数,减少了用户努力。该方法的新颖性在于能够识别非结构化网格中的线结构,其耦合到Hamiltonian STRAND求解器以计算流量的全部不稳定Navier-Stokes方程,包括包括层/湍流边界层转换模型。另外,该求解器可用于运行大量情况以产生翼型表并量化测量不确定性的效果。

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