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首页> 外文期刊>Computers & Fluids >Direct computation of aeroacoustic fields in laminar flows: Solver development and assessment of wall temperature effects on radiated sound around bluff bodies
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Direct computation of aeroacoustic fields in laminar flows: Solver development and assessment of wall temperature effects on radiated sound around bluff bodies

机译：层流动流动的机动气流场直接计算：求解器开发和墙面温度效应对虚张声的辐射声音的评估

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摘要

This work presents results of a direct computation of acoustic fields produced by several laminar flow configurations. A solver specifically developed for compressible mass, momentum and energy equations, named caafoam, is presented. Low-storage high-order Runge-Kutta schemes were used for time integration, and an unstructured colocated finite-volume method for space discretization. A sponge-layer-type non-reflective boundary treatment was adopted to avoid spurious numerical reflections at the far-field boundaries. These techniques were chosen and tested to see if they enable a broad range of physical phenomena, with a particular emphasis on aeroacoustic problems, to be solved. The reliability, efficiency and robustness of caafoam was demonstrated by computing several benchmarks concerning far-field aerodynamic sound. After proving the direct simulation capabilities of caafoam, it was used to analyze the effect of the wall temperature conditions on the aeroacoustic sound produced by laminar flows over bluff bodies. (C) 2020 Elsevier Ltd. All rights reserved.
机译：这项工作提出了由多个层流配置产生的声场的直接计算的结果。提出了一种专门用于可压缩的质量，动量和能量方程，名为CAAFOAM的求解器。低存储的高阶跑步-Kutta方案用于时间集成，以及用于空间离散化的非结构化光环有限体积方法。采用海绵层型非反射边界处理来避免在远场边界处的虚假数值反射。选择和测试这些技术，看看它们是否能够解决广泛的物理现象，特别强调气动问题。通过计算关于远场空气动力学声音的几个基准来证明了CAAFOAM的可靠性，效率和鲁棒性。在证明CAAFOAM的直接模拟能力之后，它用于分析壁温条件对由虚空体的流动流出的流动声音的影响。 （c）2020 elestvier有限公司保留所有权利。

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