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Shock waves in an elliptical cavity with varying height
Luleå tekniska universitet.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0001-8355-2414
1997 (English)In: Shock Waves, ISSN 0938-1287, E-ISSN 1432-2153, Vol. 7, no 6, p. 343-350Article in journal (Refereed) Published
Abstract [en]

Transient shock waves in a confined elliptical chamber are experimentally investigated. Quantitative results of the pressure distribution are obtained for an air-filled cavity. Lower bounding surfaces of different geometrical shapes can be inserted making it possible to get chambers with varying height. An electrical discharge across a pair of electrodes inside the cavity gives rise to the shock waves. Double pulsed holographic interferometry is used to study the propagation and focusing process of the waves. The results are quantitatively evaluated by using the method of two-reference-beam holography. The angular pressure distribution behind the converging wave front is presented for different geometries of an air-filled cavity. The pressure distribution is non-homogeneous but symmetric along the wave front. The pressure level is higher for the geometry where the height of the chamber decreases with the radial distance from the outgoing focus and lower for increasing height of the chamber. In addition, shock waves in a water-filled cavity are studied. In this case qualitative results are obtained.

Place, publisher, year, edition, pages
1997. Vol. 7, no 6, p. 343-350
National Category
Applied Mechanics
Research subject
Experimental Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-9770DOI: 10.1007/s001930050089ISI: 000071011800004Local ID: 8737f1d0-02bc-11dc-ad0a-000ea68e967bOAI: oai:DiVA.org:ltu-9770DiVA, id: diva2:982708
Note
Godkänd; 1997; 20070515 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Gren, PerWåhlin, Anders

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