ダクト内流体音の基礎現象を対象とした数値解析の精度評価

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  • Evaluation of the Accuracy of Numerical Analysis for Fundamental Phenomena of Flow Noise in a Duct

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In order to establish prediction technology of fluid sound in air conditioning duct system, the prediction technology by numerical analysis is required. In this study, noise and pipe resonance as basic phenomena of fluid noise generated in the air conditioning duct were predicted by using numerical analysis. An experimental setup for the simulation model was installed in an anechoic room with supplying a smooth air flow and the acoustic characteristics of the noise from a square cylinder and a split plate at the duct end with the pipe resonance were observed. The simulation results reproduced the discrete frequency by the Aeolian tone and pipe resonance observed in the experiment qualitatively.

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