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Focusing of weak shock waves in a slightly elliptical cavity
Luleå tekniska universitet.
1987 (engelsk)Inngår i: Journal of Sound and Vibration, ISSN 0022-460X, E-ISSN 1095-8568, Vol. 116, nr 1, s. 137-148Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This paper presents theoretical work on the wave motion in an elliptical water jet generator. Such a device consists of a water filled elliptical cavity in which a shock wave is induced at one focus by a spark discharge. The shock converges to the other focus and via a convergent duct is allowed to reflect off a free surface of the liquid at the front of a nozzle, whereby a jet is emitted. The initial value problem of how a weak shock develops and how it is reflected from the walls of a cavity with small eccentricity is studied by using acoustic theory and a perturbation technique. In order to account for the distensibility of the wall material its admittance is introduced as a parameter. The validity of the results is extended to larger eccentricities by use of Padé approximants and by comparison with a geometrical acoustics solution to the same problem. The implications of the results on the design of the water jet generator are indicated.

sted, utgiver, år, opplag, sider
1987. Vol. 116, nr 1, s. 137-148
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URN: urn:nbn:se:ltu:diva-6220DOI: 10.1016/S0022-460X(87)81325-1Scopus ID: 2-s2.0-85025784898Lokal ID: 46ab6880-a4c6-11db-8975-000ea68e967bOAI: oai:DiVA.org:ltu-6220DiVA, id: diva2:979097
Merknad

Godkänd; 1987; 20070115 (ysko)

Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2017-08-22bibliografisk kontrollert

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