Calculation of the Sound Generation Due to a Frontal Collision of two Pairs of Vortices
In this paper the sound generation due to a frontal collision of two pairs of vortices is examined. One finds that with the method of “Matched Asymptotic Expansions” and the theory of generalised functions one can give analytic expressions for almost all quantities of fluid-mechanical interest, if the Mach number is small. It turns out that the sound pressure is proportional to the second power of Mach number. The total radiated energy obeys a V 6 law, where V is the speed of the pairs of vortices at infinity.
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Document Type: Research Article
Publication date: January 1, 1971
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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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