315 プレートから放射される空力音の数値解析(OS-7 乱流・音)

概要

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In our experiment, it is obtained that the intensity of aerodynamic sound generated from a plate isn't proportional to U^6 and the sound directivity from the dipoles is biased toward upper stream side, as the ratio of plate chord-length to acoustic wave-length becomes large. The numerical analysis for various thickness plates is performed by use of the combined method consists of two-dimensional CFD code and two-dimensional aeroacoustic code based on Lighthill's equation in order to compare with the experimental data and thereafter to investigate the sound source. As a result, the calculated sound fields are qualitatively in reasonable agreement with the experimental ones. Moreover, it is found that the pressure fluctuations on plate surface correlates with Lighthill's sound source term.
社団法人日本機械学会の論文
2000-03-16