Modeling and analysis of the high energy liner experiment, HEL1
Abstract
A high energy, massive liner experiment, driven by an explosive flux compressor generator, was conducted at VNIIEF firing point, Sarov, on August 22, 1996. We report results of numerical modeling and analysis we have performed on the solid liner dynamics of this 4.0 millimeter thick aluminum liner as it was imploded from an initial inner radius of 236 mm onto a Central Measuring Unit (CMU), radius 55 mm. Both one and twodimensional MHD calculations have been performed, with emphasis on studies of RayleighTaylor instability in the presence of strength and on liner/glide plane interactions. Onedimensional MHD calculations using the experimental current profile confirm that a peak generator current of 100105 MA yields radial liner dynamics which are consistent with both glide plane and CMU impact diagnostics. These calculations indicate that the liner reached velocities of 6.97.5 km/s before CMU impact. Kinetic energy of the liner, integrated across its radial crosssection, is between 1822 MJ. Since the initial goal was to accelerate the liner to at least 20 MJ, these calculations are consistent with overall success. Twodimensional MHD calculations were employed for more detailed comparisons with the measured data set. The complete data set consisted of over 250 separate probe traces.more »
 Authors:

 and others
 Publication Date:
 Research Org.:
 Los Alamos National Lab., NM (United States)
 Sponsoring Org.:
 USDOE, Washington, DC (United States)
 OSTI Identifier:
 615663
 Report Number(s):
 LAUR972360; CONF970611314
ON: DE97008674; TRN: 98:005737
 DOE Contract Number:
 W7405ENG36
 Resource Type:
 Conference
 Resource Relation:
 Conference: 11. IEEE international pulsed power conference, Baltimore, MD (United States), 29 Jun  2 Jul 1997; Other Information: PBD: 1997
 Country of Publication:
 United States
 Language:
 English
 Subject:
 66 PHYSICS; MAGNETOHYDRODYNAMICS; ALUMINIUM; IMPLOSIONS; PULSE GENERATORS; RAYLEIGHTAYLOR INSTABILITY
Citation Formats
Faehl, R J, Sheehey, P T, and Reinovsky, R E. Modeling and analysis of the high energy liner experiment, HEL1. United States: N. p., 1997.
Web.
Faehl, R J, Sheehey, P T, & Reinovsky, R E. Modeling and analysis of the high energy liner experiment, HEL1. United States.
Faehl, R J, Sheehey, P T, and Reinovsky, R E. Fri .
"Modeling and analysis of the high energy liner experiment, HEL1". United States. https://www.osti.gov/servlets/purl/615663.
@article{osti_615663,
title = {Modeling and analysis of the high energy liner experiment, HEL1},
author = {Faehl, R J and Sheehey, P T and Reinovsky, R E},
abstractNote = {A high energy, massive liner experiment, driven by an explosive flux compressor generator, was conducted at VNIIEF firing point, Sarov, on August 22, 1996. We report results of numerical modeling and analysis we have performed on the solid liner dynamics of this 4.0 millimeter thick aluminum liner as it was imploded from an initial inner radius of 236 mm onto a Central Measuring Unit (CMU), radius 55 mm. Both one and twodimensional MHD calculations have been performed, with emphasis on studies of RayleighTaylor instability in the presence of strength and on liner/glide plane interactions. Onedimensional MHD calculations using the experimental current profile confirm that a peak generator current of 100105 MA yields radial liner dynamics which are consistent with both glide plane and CMU impact diagnostics. These calculations indicate that the liner reached velocities of 6.97.5 km/s before CMU impact. Kinetic energy of the liner, integrated across its radial crosssection, is between 1822 MJ. Since the initial goal was to accelerate the liner to at least 20 MJ, these calculations are consistent with overall success. Twodimensional MHD calculations were employed for more detailed comparisons with the measured data set. The complete data set consisted of over 250 separate probe traces. From these data and from their correlation with the MHD calculations, we can conclude that the liner deviated from simple cylindrical shape during its implosion. Twodimensional calculations have clarified our understanding of the mechanisms responsible for these deformations. Many calculations with initial outer edge perturbations have been performed to assess the role of RayleighTaylor instability. Perturbation wavelengths between 432 mm and amplitudes between 8240 {mu}m have been simulated with the experimental current profiles. When strength is omitted short wavelengths are observed to grow to significant levels; material strength stabilizes such modes in the calculations.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {8}
}