Thermoacoustic, Small Cavity Excitation to Achieve Optimal Performance
Abstract:The compactness of thermoacoustic devices is a topic of continuing importance in fundamental thermoacoustics and in its practical applications. The design for a small scale thermoacoustic refrigerator is presented in this paper. Two loudspeakers, set at the opposite ends of a small cavity and fully enclosed within the device, create an appropriate acoustic field inside a stack filling this cavity. A push-pull concept with two cavities placed on either side of one of the loudspeakers could be considered. An analytical approach describing the pressure and velocity fields which can be obtained from these sources is provided, assuming that the wavelength is much greater than the dimensions of the cavity. This new thermoacoustic device simultaneously provides compactness and flexibility compared to the classical standing wave or traveling wave devices which would achieve equivalent performances.
Document Type: Research Article
Publication date: November 1, 2011
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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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