An Impedance Condition for Avoiding Acoustic Oscillations Generated by Gas Flames
Self-starting acoustic oscillations in combustion chambers generated by gas flames are studied theoretically. These oscillations are caused by a periodic variation in the release of heat as a result of the sound waves excited in the gas supply system. For avoiding the oscillations a condition for the specific acoustic impedance at the outlet of the gas is derived and represented graphically in the planes of the complex impedance or the complex reflection factor. This stability condition represents a new formulation of a criterion given by Lord RAYLEIGH for heat induced oscillations and a generalization of various known conditions for the length of the gas supply tube.
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Document Type: Research Article
Publication date: April 1, 1974
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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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