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Temporal Dynamics of the Sound Wind in Acoustitron

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The process of the closed-loop acoustic streaming development in an acoustitron is described analytically. The acoustitron is an annular acoustic resonator excited by the motion of its walls. Sound wind in the acoustitron is generated due to nonlinear processes in the boundary layers. The theory predicts the possibility of excitation by travelling acoustic wave, a stationary streaming with opposite directions of the velocity near the walls and in the centre of the waveguide. The direction of the cross-section averaged streaming depends on the regime of sound interaction with the waveguide walls and changes in transition from the quasi-isothermal regime to the extreme quasi-adiabatic one. The variation of the cross-section averaged velocity in time can be non-monotonous. Moreover the velocity can change its direction in the process of streaming development. Because the geometry of the acoustitron and the wave interactions in it are similar to those taking place in the travelling wave thermoacoustic devices, the theory developed is expected to find applications in thermoacoustics.
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Document Type: Research Article

Publication date: November 1, 2003

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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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