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Experimental Study of Gas Bubble Oscillations Using a Shock Tube

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Free oscillations of gas bubbles in a liquid are studied in detail. A shock tube is used to generate the pressure step in the liquid necessary to excite the bubble for free oscillations. Bubble wall motion is recorded using a rotating mirror camera and acoustic waves radiated by the bubble are monitored using a needle hydro-phone. By varying the step size of the driving pressure different bubble oscillation intensities are investi-gated. The experimental data obtained are compared with theoretical predictions and, generally, a rela-tively good agreement between theory and experi-ment is found. However, a few interesting deviations are also observed and discussed.


Freie Gasblasenoszillationen in einer Flüssigkeit warden detailliert untersucht. Der zur Schwingungsanregung be-nötigte Drucksprung in der Flüssigkeit wird mit Hilfe eines Stoßrohres erzeugt. Die Bewegung der Blasenwand wird mittels einer Hochgeschwindigkeits-Drehspiegelka-mera aufgezeichnet; zur Messung der von der Blase aus-gestrahlten akustischen Wellen wird ein Nadelhydro-phon verwendet. Die Variation des Drucksprungs erlaubt die Untersuchung verschiedener Schwingungsintensitä-ten. Die experimentellen Daten werden mit theoretischen Berechnungen verglichen, wobei sich generell eine recht gute Übereinstimmung zwischen Theorie und Experi-ment ergibt. Einige interessante Abweichungen werdenallerdings auch beobachtet und diskutiert.


Nous avons étudié en détail les oscillations libres de bul-les gazeuses en milieu liquide. L' échelon de pression né-cessaire pour exciter les oscillations libres des bulles a été produit dans un tube à onde de choc. On a enregistré le mouvement des parois des bulles à l'aide d'une caméra à miroir tournant, et capté les ondes rayonnées au moyen d'un hydrophone aiguille. En faisant varier l'ampleur de la surpression excitatrice, il a été possible d'examiner differentes amplitudes d'oscillation des bulles. La compa-raison des résultats expérimentaux et des previsions théo-riques fait apparaître un accord relativement bon. Il y a cependant quelques écarts remarquables, que l'on dis-cute, entre theorie et experience.
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Document Type: Research Article

Publication date: January 1, 1992

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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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