S0505-1-3 平板翼列から放射される空力音響共鳴音の発生条件(車両・機体・流体機械に関連した騒音問題へのアプローチと対策(1))

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  • S0505-1-3 Generation condition for aeroacoustics resonance noise from a cascade of flat blades

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The purpose of this research is to clarify the generation condition of aeroacoustics resonance noise radiated from a cascade of flat blades. Resonance frequencies and static pressure fluctuations were measured in a low noise wind tunnel. An empirical model for the estimation of the effective length of the acoustic field was suggested. The static pressure fluctuation is large at the center of the cascade. On the other hand, the pressure fluctuation is sufficiently small near the effective length. The resonance frequency can be estimated with the effective length calculated by using the empirical model.

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