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Shock Waves

, Volume 29, Issue 2, pp 355–360 | Cite as

Approximating a free-field blast environment in the test section of an explosively driven conical shock tube

  • J. B. StewartEmail author
Technical Note

Abstract

This paper presents experimental data on incident overpressures and the corresponding impulses obtained in the test section of an explosively driven \(10^\circ \) (full angle) conical shock tube. Due to the shock tube’s steel walls approximating the boundary conditions seen by a spherical sector cut out of a detonating sphere of energetic material, a 5.3-g pentolite shock tube driver charge produces peak overpressures corresponding to a free-field detonation from an 816-g sphere of pentolite. The four test section geometries investigated in this paper (open air, cylindrical, \(10^\circ \) inscribed square frustum, and \(10^\circ \) circumscribed square frustum) provide a variety of different time histories for the incident overpressures and impulses, with a circumscribed square frustum yielding the best approximation of the estimated blast environment that would have been produced by a free-field detonation.

Keywords

Air shock Air blast Shock tube Explosively driven shock tube 

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature(outside the USA) 2018

Authors and Affiliations

  1. 1.U.S. Army Research Laboratory, ATTN: RDRL-WMP-GAberdeen Proving GroundUSA

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