Comparison of Source Term Formulations for Computational Aeroacoustics
Comparison of Source Term Formulations for Computational Aeroacoustics
复制标题
计算气动声学源项公式的比较
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
M. Kaltenbacher
中科院分区：
文献类型：
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作者：
A. Hüppe;M. Kaltenbacher
计算流致声的一个最成熟的方案是基于Lighthill的类比。虽然用有限元法计算Lighthill波动方程在远离气动声源的区域给出了可靠的结果，但正如Lighthill本人所指出的，声源区域内的声学结果的有效性是值得怀疑的。这是由于Lighthill的源项公式不区分流量和声学量。此外，背景流对波传播的影响，如折射和对流，只考虑隐含在源项。机械与机电一体化研究所高级科学家。†机械和机电一体化研究所教授。
One of the most established schemes for the computation of flow induced sound is based on Lighthill’s analogy. Although computations with FEM for Lighthill’s wave equation give reliable results in regions far away from the aeroacoustic sources, the validity of acoustic results inside the source region is questionable as aready pointed out by Lighthill himself. This is due to the fact, that the source term formulation of Lighthill does not differentiate between flow and acoustic quantities. Moreover, effects of a background flow on the wave propagation like refraction and convection are only considered implicitly in the source term. In ∗Senior scientist, Institute of Mechanics and Mechatronics. †Professor, Institute of Mechanics and Mechatronics.