Attenuation of strong external blast by foam barriers
2016 (English)In: Physics of fluids, ISSN 1070-6631, E-ISSN 1089-7666, Vol. 28, no 9, 096105Article in journal (Refereed) Published
The mitigation of externally generated strong blast waves by an aqueous foam barrier of varying configurations within fixed distance between the explosion origin and the object to be protected is investigated and quantified both experimentally and numerically. The blast waves of shock Mach number 4.8 at 190 mm from the explosion plane are generated using exploding wire technique. The initially cylindrical blast waves are transformed into a plane blast wave in a specially constructed test unit in which the experiments are performed. The shock waves emanating from the foam barrier are captured using shadowgraph technique. A simple numerical model treating the foam by a pseudo-gas approach is used in interpreting and reconstructing the experimental results. The additional contribution of the impedance mismatch factor is analysed with the aid of numerical simulation and exploited for achieving greater blast wave pressure reduction.
Place, publisher, year, edition, pages
American Institute of Physics Inc , 2016. Vol. 28, no 9, 096105
Numerical models, Shock waves, A-plane, Aqueous foams, Blast waves, Exploding wire technique, Impedance mismatch factors, Shadowgraph technique, Test unit, Exploding wires
IdentifiersURN: urn:nbn:se:kth:diva-194875DOI: 10.1063/1.4963243ISI: 000384878900039ScopusID: 2-s2.0-84989361083OAI: oai:DiVA.org:kth-194875DiVA: diva2:1055773
QC 201612132016-12-132016-11-012016-12-13Bibliographically approved