한국소음진동공학회논문집 (Transactions of the Korean Society for Noise and Vibration Engineering)

  • 제17권12호
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  • Pages.1223-1229
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  • 2007
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  • 1598-2785(pISSN)
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  • 2287-5476(eISSN)
한국소음진동공학회 (The Korean Society for Noise and Vibration Engineering)
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와류진동 조절에 의한 유동가진 공동 내부의 음압 제어

Control of Sound Pressure inside a Flow Excited Cavity by Regulation of Vorticity Shedding

  • 발행 : 2007.12.30
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초록

Flow traveling over a cavity opening forms a vortex due to unstable shear layer and induces an aerodynamic pressure excitation from the diffusion of the vortex convecting out of the trailing edge of the opening. The interaction between the excitation force and the cavity response sustains resonance in the resonator(cavity) and locked-in vortex shedding at the leading edge of the opening. The aerodynamic excitation force can be described from the diffusion of the vortex over the trailing edge and the level of its diffusivity is related to the strength of vorticity seeded at the leading edge. In this study, the control scheme of the internal pressure oscillation was proposed from regulating the vorticity at the leading edge by use of an oscillating spoiler. It was found that the relative motion between the spoiler and the air mass at the cavity opening influenced vorticity strength and the control was achieved by direct feedback of the cavity pressure fluctuation to the actuator.

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참고문헌

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피인용 문헌

  1. Development of an active deflector system for sunroof buffeting noise control vol.20, pp.16, 2014, https://doi.org/10.1177/1077546313479991