Change search
ReferencesLink to record
Permanent link

Direct link
An experimental and theoretical study of converging polygonal shock waves
KTH, Superseded Departments, Mechanics.
KTH, Superseded Departments, Mechanics.
KTH, Superseded Departments, Materials Science and Engineering.
2002 (English)In: Shock Waves, ISSN 0938-1287, E-ISSN 1432-2153, Vol. 12, no 1, 39-58 p.Article in journal (Refereed) Published
Abstract [en]

An experimental investigation was carried out to explore the possibility of producing converging polygonal shocks in an essentially two-dimensional cavity. Previous calculations by Apazidis and Lesser (1996) suggested that such configurations could be produced by reflecting a cylindrical outgoing shock from a smoothly altered circular boundary, the alteration having n-gonal symmetry. In the experiments the outgoing shock was produced by a spark discharge which yielded shocks in the Mach number range from 1.1 to 1.7 at a radius just prior to the reflection. Polygonal shocks were observed as predicted by using a modified form of geometrical shock dynamics, derived in the above paper. In addition, the modified theory was used to calculate the results of an experiment carried out by Sturtevant and Kulkarny (1976). The results of the numerical calculations were found to be in substantial agreement with both experiments, suggesting that the modifications in geometrical shock dynamics for non-uniform flow ahead of an advancing shock are useful in the case of shock focusing. The experiment. also showed that the polygonal shapes were stable in the examined range of shock Mach numbers. a result that may be of importance for a number of practical situations in which shock focusing is present.

Place, publisher, year, edition, pages
2002. Vol. 12, no 1, 39-58 p.
Keyword [en]
shock focusing, converging polygonal shocks, geometrical shock dynamics, dynamics
URN: urn:nbn:se:kth:diva-21773DOI: 10.1007/s00193-002-0143-4ISI: 000177180000006OAI: diva2:340471
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Apazidis, NicholasTillmark, NilsJohansson, Börje
By organisation
MechanicsMaterials Science and Engineering
In the same journal
Shock Waves

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 24 hits
ReferencesLink to record
Permanent link

Direct link