日本機械学会論文集B編
Online ISSN : 1884-8346
ISSN-L : 1884-8346
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流体騒音研究へのPOD複合解析の適用
寺島 修渡辺 徹森田 潔阿部 行伸酒井 康彦長田 孝二大西 一弘
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2013 年 79 巻 808 号 p. 2764-2768

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In this study, a technique was developed to analyze the relation between flow structures and the emitted sound pressure using proper orthogonal decomposition and linear stochastic estimation; experiments were conducted to examine the technique's feasibility. Data obtained by simultaneous measurement of the velocity field in the wake of a circular cylinder and far field sound pressure emitted by it were analyzed by present technique. The results showed that the emitted peak sound pressure was strongly related to the first mode of the velocity field in the wake near the cylinder with a pair of fluid lumps having positive and negative streamwise velocity fluctuations on opposite sides of the centerline of the wake. Therefore, this complementary technique may be useful for detecting the flow structure related to the sound emission.

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© 2013 一般社団法人 日本機械学会
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