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首页> 外文期刊>Computer Methods in Applied Mechanics and Engineering >Direct numerical simulation of aerodynamic sounds by a compressible CFD scheme with node-by-node finite elements
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Direct numerical simulation of aerodynamic sounds by a compressible CFD scheme with node-by-node finite elements

机译：带有逐点有限元的可压缩CFD方案对空气动力学声音的直接数值模拟

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摘要

A direct numerical simulation (DNS) of aerodynamic sounds is performed by using a compressible CFD scheme with node-by-node finite elements. Although the computational simulations of aerodynamic sounds generated from three-dimensional objects with complex boundary shapes are required in various industrial applications, such simulations involve a lot of difficulties regarding instability in numerical schemes and enormous computational costs. In this paper, the present authors have combined the C-CUP (CIP-Combined Unified Procedure, CIP: Constrained Interpolation Profile) method and the CIVA (Cubic Interpolation with Volume/Area Coordinates) method with the Free Mesh Method (FMM) in order to achieve efficient simulation of aerodynamic sounds using unstructured computational grids of finite elements on parallel computers. As a numerical example, the edge tone is successfully computed using the present method with parallel computing with Hitachi SR8000 supercomputer.
机译：通过使用具有逐个节点有限元的可压缩CFD方案，可以对空气动力学声音进行直接数值模拟（DNS）。尽管在各种工业应用中需要对由具有复杂边界形状的三维物体产生的空气动力声音进行计算仿真，但是这种仿真在数值方案的不稳定性和巨大的计算成本上涉及许多困难。在本文中，作者将C-CUP（CIP联合统一过程，CIP：约束插值配置文件）方法和CIVA（带体积/面积坐标的三次插值）方法与自由网格方法（FMM）相结合。使用并行计算机上有限元的非结构化计算网格来实现空气动力学声音的高效仿真。作为数值示例，使用本发明的方法并与日立SR8000超级计算机并行计算成功地计算了边缘色调。

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