Abstract

A method of predictive simulation of flow-induced noise using computational fluid dynamics has been developed. In order to simulate flow-induced noise, it is necessary to compute detailed vortex flows and density change of air. This paper introduces the existence of flow-induced noise predicted by unsteady compressible flow calculations using large vortex simulation, a type of turbulence model. The target flow-induced noise for prediction was narrow-band noise, also known as whistling noise, a type of noise in which sound increases at specific frequencies. With the exhaust pipe, including the complex shape of the silencer, as the subject of predictive simulation of flow-induced noise, predictive accuracy was verified by simulating the measurement conditions of steady-state flow. The developed method makes it possible to judge whether narrow-band noise will be generated or not, and to identify the position of the sound source.

References

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Author (organization or company)

• Katsutomo KANAI（Automobile R&D Center）
• Hideki KATSUYAMA（Automobile R&D Center）
• Yuichi FUSHIMI（Automobile R&D Center）
• Norikazu YAMAMOTO（Automobile R&D Center）

Publication Information

Article of Honda R&D Technical Review Vol.26 No.2 (156 - 164)

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