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Experimental and Numerical Study of Flow over a Cavity for Reduction of Buffeting Noise

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Experimental and numerical investigations are conducted to investigate the noise induced by a subsonic flow over a cavity. Particular attention is focused on the problem of low-frequency pressure oscillations inside the cabins of automobiles with open sunroofs. The mechanisms of buffeting noise are examined by considering a model cavity. Extensive experiments are performed to validate the computational scheme developed in the present study. This computational scheme is used for designing generic deflectors for reducing buffeting noise. Experimental and computational results show that the traditional generic deflector is unable to reduce the buffeting noise when the flow velocity is sufficiently high. However, a vented deflector allows the effective control of the buffeting noise at relatively high flow speeds.
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Document Type: Research Article

Publication date: July 1, 2012

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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