1511 Correlation between fluctuating velocity and jet-excited tone generated in the axisymmetric cavity

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  • 1511 軸対称キャビティで発生する共鳴音と速度変動との相関(J11-2 流れと音の相関計測,J11 流体関連の騒音と振動)

Abstract

This paper presents experimental investigations on relationships between jet-generated tone and fluctuating velocity in an axisymmetric deep cavity. It is shown that Strouhal frequencies obtained from predominant components in spectra of both quantites agree fairly well respectively and each of them increases as cavity length/diameter ratio is increased up to roughly 0.6. It is also shown that the correlation of both components becomes strongest close to the cavity exit. These facts suggest medium-particle excitations with the predominant frequency of resonance tone caused by vortices impinging on the cavity-end edge.

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