Appraisal of UTIAS implosion-driven hypervelocity launchers and shock tubes

Glass, I. I.

doi:10.1016/0376-0421(72)90017-6

Cited by 17 publications

(2 citation statements)

References 8 publications

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“…For example, while a hypervelocity launcher in which a spherically imploding wave is focused onto a projectile can, in theory, generate projectile velocities in excess of 10 km/s, in practice, the projectile is unable to survive the intense loading at the focus point of the implosion. 2 Alternatively, if the implosion process is distributed continuously along the launch tube, the projectile loading can be maintained at a nearly constant moderate level for the entire launch cycle (note that "moderate" may still mean accelerations as great as 10 8 m/s 2 ).…”

Section: Introductionmentioning

confidence: 99%

Dynamics of explosively imploded pressurized tubes

Szirti

Loiseau

Higgins

et al. 2011

Journal of Applied Physics

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The detonation of an explosive layer surrounding a pressurized thin-walled tube causes the formation of a virtual piston that drives a precursor shock wave ahead of the detonation, generating very high temperatures and pressures in the gas contained within the tube. Such a device can be used as the driver for a high energy density shock tube or hypervelocity gas gun. The dynamics of the precursor shock wave were investigated for different tube sizes and initial fill pressures. Shock velocity and standoff distance were found to decrease with increasing fill pressure, mainly due to radial expansion of the tube. Adding a tamper can reduce this effect, but may increase jetting. A simple analytical model based on acoustic wave interactions was developed to calculate pump tube expansion and the resulting effect on the shock velocity and standoff distance. Results from this model agree quite well with experimental data. V

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Section: Introductionmentioning

confidence: 99%

Dynamics of explosively imploded pressurized tubes

Szirti

Loiseau

Higgins

et al. 2011

Journal of Applied Physics

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“…However, it is not clear whether or not converging shock waves are stable. Glass (1972) constructed a hemispherical implosion chamber and Saito & Glass (1982) succeeded in imploding a hemispherical shock wave at its centre. Extremely high pressures and temperatures were generated at the focal zone in proportion to the amount of energy released, but the stability of imploding shock waves was not discussed.…”

Section: Introductionmentioning

confidence: 99%

Implosion of a spherical shock wave reflected from a spherical wall

Hosseini¹,

Takayama²

2005

J. Fluid Mech.

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The paper describes results of experiments of a converging spherical shock wave reflected from a spherical wall. In order to visualize the motion and the flow field behind the shock waves, an aspheric lens-shaped transparent test section made of acrylic PMMA (polymethyl methacrylate) with an inner spherical cavity was designed and constructed. This test section made optical flow visualization with collimated object beams possible. Spherical shock waves were produced at the centre of the spherical cavity by explosion of silver azide pellets ranging from 1.0 to 10.0 mg with corresponding energies of 1.9 to 19 J. The charges were ignited by irradiation of a pulsed Nd:YAG laser beam. Pressures were also measured at two points with pressure transducers mounted flush at the inner wall of the test section. The pellet was simultaneously ignited on two sides or was shaped to produce a uniform diverging spherical shock wave. This spherically diverging shock wave was reflected from the spherical inner wall of the test section to form a converging spherical shock wave. We visualized the shock-wave motion by using double exposure holographic interferometry and time-resolved high-speed video recording. The sequence of diverging and converging spherical shock-wave propagations and their interaction with gaseous explosion products were observed. The convergence, acceleration and stability of the imploding shock wave in the test section were studied.

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Experimental Study of the Richtmyer-Meshkov Instability Induced by Cylindrical Converging Shock Waves

Zhai

Luo

et al. 2015

29th International Symposium on Shock Waves 2

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Appraisal of UTIAS implosion-driven hypervelocity launchers and shock tubes

Cited by 17 publications

References 8 publications

Dynamics of explosively imploded pressurized tubes

Dynamics of explosively imploded pressurized tubes

Implosion of a spherical shock wave reflected from a spherical wall

Experimental Study of the Richtmyer-Meshkov Instability Induced by Cylindrical Converging Shock Waves

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