The incidence angle of a detonation wave in a conventional high explosive influences the acceleration and terminal velocity of a metal flyer by increasing the magnitude of the material velocity imparted by the transmitted shock wave as the detonation is tilted towards normal loading. For non-ideal explosives heavily loaded with inert additives, the detonation velocity is typically subsonic relative to the flyer sound speed, leading to shockless accelerations when the detonation is grazing. Further, in a grazing detonation the particles are initially accelerated in the direction of the detonation and only gain velocity normal to the initial orientation of the flyer at later times due to aerodynamic drag as the detonation products expand. If the detonation wave in a non-ideal explosive instead strikes the flyer at normal incidence, a shock is transmitted into the flyer and the first interaction between the particle additives and the flyer occurs due to the imparted material velocity from the passage of the detonation wave. Consequently, the effect of incidence angle and additive properties may play a more prominent role in the flyer acceleration. In the present study we experimentally compared normal detonation loadings to grazing loadings using a 3-mm-thick aluminum slapper to impact-initiate a planar detonation wave in non-ideal explosive-particle admixtures, which subsequently accelerated a second 6.4-mm-thick flyer. Flyer acceleration was measured with heterodyne laser velocimetry (PDV). The explosive mixtures considered were packed beds of glass or steel particles of varying sizes saturated with sensitized nitromethane, and gelled nitromethane mixed with glass microballoons. Results showed that the primary parameter controlling changes in flyer velocity was the presence of a transmitted shock, with additive density and particle size playing only secondary roles. These results are similar to the grazing detonation experiments, however under normal loading the largest, higher density particles yielded the highest terminal flyer velocity, whereas in the grazing experiments the larger, low density particles yielded the highest terminal velocity.
Skip Nav Destination
Article navigation
13 January 2017
SHOCK COMPRESSION OF CONDENSED MATTER - 2015: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter
14–19 June 2015
Tampa Bay, Florida, USA
Research Article|
January 13 2017
The effect of detonation wave incidence angle on the acceleration of flyers by explosives heavily laden with inert additives
Jason Loiseau;
Jason Loiseau
a)
1
McGill University
, Dept. of Mechanical Engineering, 817 Sherbrooke Street West Montréal, QC, H3A 0C3, Canada
Search for other works by this author on:
William Georges;
William Georges
1
McGill University
, Dept. of Mechanical Engineering, 817 Sherbrooke Street West Montréal, QC, H3A 0C3, Canada
Search for other works by this author on:
David L. Frost;
David L. Frost
1
McGill University
, Dept. of Mechanical Engineering, 817 Sherbrooke Street West Montréal, QC, H3A 0C3, Canada
Search for other works by this author on:
Andrew J. Higgins
Andrew J. Higgins
1
McGill University
, Dept. of Mechanical Engineering, 817 Sherbrooke Street West Montréal, QC, H3A 0C3, Canada
Search for other works by this author on:
a)
Corresponding author: [email protected]
AIP Conf. Proc. 1793, 060021 (2017)
Citation
Jason Loiseau, William Georges, David L. Frost, Andrew J. Higgins; The effect of detonation wave incidence angle on the acceleration of flyers by explosives heavily laden with inert additives. AIP Conf. Proc. 13 January 2017; 1793 (1): 060021. https://doi.org/10.1063/1.4971577
Download citation file:
Citing articles via
Inkjet- and flextrail-printing of silicon polymer-based inks for local passivating contacts
Zohreh Kiaee, Andreas Lösel, et al.
Design of a 100 MW solar power plant on wetland in Bangladesh
Apu Kowsar, Sumon Chandra Debnath, et al.
Effect of coupling agent type on the self-cleaning and anti-reflective behaviour of advance nanocoating for PV panels application
Taha Tareq Mohammed, Hadia Kadhim Judran, et al.
Related Content
Non-Gurney scaling of explosives heavily loaded with dense inert additives
AIP Conference Proceedings (July 2018)
Influence of thick surface coatings on jet formation in flyer plate impacts
AIP Conference Proceedings (January 2017)
Assessing the effect of the role of detonation wave curvature on the firing times of high voltage detonators
AIP Conference Proceedings (July 2018)
High fidelity dynamic 3D characterization of in-flight exploding foil initiator flyers based on microscope photonic Doppler velocimetry
J. Appl. Phys. (June 2024)
An Investigation into the Initiation of Hexanitrostilbene by Laser‐Driven Flyer Plates
AIP Conference Proceedings (July 2002)