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High-Resolution Finite Volume Methods on Unstructured Grids for Turbulence and Aeroacoustics

机译:非结构化网格上湍流和航空声学的高分辨率有限体积方法

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In this paper we focus on the application of a higher-order finite volume method for the resolution of Computational Aeroacoustics problems. In particular, we present the application of a finite volume method based in Moving Least Squares approximations in the context of a hybrid approach for low Mach number flows. In this case, the acoustic and aerodynamic fields can be computed separately. We focus on two kinds of computations: turbulent flow and aeroacoustics in complex geometries. Both fields require very accurate methods to capture the fine features of the flow, small scales in the case of turbulent flows and very low-amplitude acoustic waves in the case of aeroacoustics. On the other hand, the use of unstructured grids is interesting for real engineering applications, but unfortunately, the accuracy and efficiency of the numerical methods developed for unstructured grids is far to reach the performance of those methods developed for structured grids. In this context, we propose the FV-MLS method as a tool for accurate CAA computations on unstructured grids.
机译:在本文中,我们专注于应用高阶有限体积方法来解决计算航空声学问题。特别是,在低马赫数流混合方法的背景下,我们提出了基于最小二乘近似的有限体积方法的应用。在这种情况下,可以分别计算声场和空气动力场。我们专注于两种计算:复杂几何形状中的湍流和空气声学。这两个场都需要非常精确的方法来捕获流的精细特征,在湍流情况下需要小尺度,在航空声学情况下需要非常低振幅的声波。另一方面,对于实际工程应用而言,使用非结构化网格很有趣,但是不幸的是,为非结构化网格开发的数值方法的准确性和效率远远不能达到为结构化网格开发的那些方法的性能。在这种情况下,我们提出FV-MLS方法作为在非结构化网格上进行精确CAA计算的工具。

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  • 来源
    《Archives of Computational Methods in Engineering》 |2011年第3期|p.315-340|共26页
  • 作者单位

    Departamento de Metodos Matematicos y de Representation,Universidade da Corona, A Coruiia, Spain;

    Laboratoire de Dynamique des Fluides (DynFluid Lab.), Arts et Metiers ParisTech, Paris, France;

    Departamento de Metodos Matematicos y de Representation,Universidade da Corona, A Coruiia, Spain;

    Dept. of Civil and Environmental Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge,MA 02139, USA;

    Departamento de Metodos Matematicos y de Representation,Universidade da Corona, A Coruiia, Spain;

    Departamento de Metodos Matematicos y de Representation,Universidade da Corona, A Coruiia, Spain;

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