System For Determining The Performance Of A Plane Wave Generator In A Shaped Charge By The Use Of High Speed Multi Streak Photography

1985 ◽  
Author(s):  
Hendrik J. van der Merwe ◽  
Donald Hollingworth
Keyword(s):  
Plane Wave ◽  
High Speed ◽  
Shaped Charge ◽  
Wave Generator

Bubble collapse and the initiation of explosion

1991 ◽  
Vol 435 (1894) ◽  
pp. 423-435 ◽  
Keyword(s):  
Shock Wave ◽  
Plane Wave ◽  
High Speed ◽  
Bubble Collapse ◽  
Thin Sheets ◽  
Subsequent Reaction ◽  
Emulsion Explosive ◽  
Wave Generator ◽  
Ignition Mechanism ◽  
Cylindrical Cavities

Experiments were conducted to investigate the initiation of an emulsion explosive containing cavities. Cylindrical cavities were created in thin sheets of either gelatine or an ammonium nitrate/sodium nitrate emulsion confined between transparent blocks. Shocks were launched into the sheets with either a flier-plate or an explosive plane-wave generator so as to collapse the cavities asymmetrically. The closure of the cavities and subsequent reaction in the explosive was photographed by using high- speed framing cameras. The collapse of the cavity proceeded in several stages. First, a high-speed jet was formed which crossed the cavity and hit the downstream wall sending out a shock wave into the surrounding material. Secondly, gas within the cavity was heated by rapid compression achieving temperatures sufficient to lead to gas luminescence. Finally, the jet penetrated the downstream wall to form a pair of vortices which travelled downstream with the flow. When such a cavity collapsed in an explosive, a reaction was observed to start in the vapour contained within the cavity and in the material around the heated gas. The ignition of material at the point at which the jet hit was found to be the principal ignition mechanism.

Ring plane wave generator

2017 ◽  
Author(s):  
Aline Cardoso Anastacio ◽  
Jakub Selesovsky ◽  
Jindrich Kucera ◽  
Jiri Pachman
Keyword(s):  
Plane Wave ◽  
Ring Plane ◽  
Wave Generator

scholarly journals Low Scattering Plane Wave Generator Design Using a Novel Non-Coplanar Structure for Near-Field Over-the-Air Testing

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 211348-211357
Author(s):  
Zhaolong Qiao ◽  
Zhengpeng Wang ◽  
Wei Fan ◽  
Xue Zhang ◽  
Steven Gao ◽  
...  
Keyword(s):  
Plane Wave ◽  
Near Field ◽  
Wave Generator ◽  
Generator Design

On the influence of the shaped charge liner manufacture technology on the high-speed element characteristics

2020 ◽  
Author(s):  
V.I. Kolpakov ◽  
N.A. Kudyukov
Keyword(s):  
High Speed ◽  
Mechanical Characteristics ◽  
Physical And Mechanical Properties ◽  
Shaped Charge ◽  
Design Parameters ◽  
Geometrical Parameters ◽  
Liner Material ◽  
Metal Spinning ◽  
Cold Stamping ◽  
Physical And Mechanical Characteristics

The paper introduces the results of numerical simulation of the functioning of shaped charges, whose liners are made of different materials. As a result of their functioning, these charges form high-speed elements. Typically, liners for such charges are produced by the cold stamping technology. An alternative method for producing the liners is metal spinning. Moreover, a spin formed liner is expected to have higher physical and mechanical properties compared to a stamped liner made of the same material and having the same geometrical parameters. To reveal the patterns of molding high-speed elements from stamped and spin formed liners, the action of shaped charges comprised of steel or copper segmental liners of small bending, was simulated numerically using the apparatus of continuum mechanics. The influence of the liner manufacture method was taken into account by varying the values of the physical and mechanical characteristics of the liner material. The design parameters of the simulated charge, with the exception of the liner bending, during the calculation study remained unchanged and corresponded to the parameters of the currently used samples. Following the numerical experiments results, the study shows that the elements molded from spin formed liners are less likely to become fractured while being formed and are also more integral (continuous) in comparison to the elements molded from stamped shaped charge liners.

Design of an Inert Material Type Plane Wave Generator

1993 ◽  
Vol 18 (3) ◽  
pp. 139-145 ◽  
Author(s):  
Chun-Yu Chen ◽  
Jong-Hwa Shiuan ◽  
I-Feng Lan
Keyword(s):  
Plane Wave ◽  
Inert Material ◽  
Material Type ◽  
Wave Generator
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