Mach Wave Control in Explosively Formed Projectile Warhead

Zhu, Chenguang; Huang, Zhengxiang; Zu, Xudong

doi:10.1002/prep.201400106

Cited by 18 publications

(8 citation statements)

References 5 publications

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“…Weimann [ 5 ] obtained a large length-diameter ratio EFP with empennage by embedding wave shaper in shaped charge. Zhu [ 6 ] studied three kinds of detonation waveforms in shaped charge with wave shaper (SCWS), and obtained a method to avoid the fracture of EFP with large length-diameter ratio by optimizing the structure of wave shaper. Many scholars carried out numerical simulation researches of shaped charges [ 7 , 8 , 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

The EFP Formation and Penetration Capability of Double-Layer Shaped Charge with Wave Shaper

et al. 2020

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Detonation waves will bypass a wave shaper and propagate in the form of a horn wave in shaped charge. Horn waves can reduce the incidence angle of a detonation wave on a liner surface and collide with each other at the charge axis to form overdriven detonation. Detection electronic components of small-caliber terminal sensitive projectile that are limited by space are often placed inside a wave shaper, which will cause the wave shaper to no longer be uniform and dense, and weaken the ability to adjust detonation waves. In this article, we design a double-layer shaped charge (DLSC) with a high-detonation-velocity explosive in the outer layer and low-detonation-velocity explosive in the inner layer. Numerical and experimental simulation are combined to compare and analyze the forming process and penetration performance of explosively formed projectile (EFP) in DLSC and ordinary shaped charge (OSC). The results show that, compared with OSC, DLSC can also adjust and optimize the shape of the detonation wave when the wave shaper performance is poor. DLSC can obtain long rod EFPs with a large length-diameter ratio, which greatly improves the penetration performance of EFP.

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Section: Introductionmentioning

confidence: 99%

The EFP Formation and Penetration Capability of Double-Layer Shaped Charge with Wave Shaper

et al. 2020

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“…This conclusion has been presented in several documents. However, the quantitative research of the influence of the wave shaper position on the penetration depth of the shaped charge given in some documents was not fully evaluated [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…Zhu et al [2] researched the process of controlling the Mach wave surface in the structure of the shaped charge with the use of the wave shaper. Results indicate that when the wave shaper is embedded in charge, the pressure behind the Mach wave can be controlled by changing the wave shaper diameter and the distance between the wave shaper and the liner.…”

Section: Introductionmentioning

confidence: 99%

Influence of Wave Shaper Position on Jet Formation and Penetration Depth

Bui

2020

AiMT

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The article presents the influence of the wave shaper position on the jet formation and penetration depth of a shaped charge, which uses the liner of the PG-7VM warhead by numerical method and experimental method. The results show that, when moving the plexiglass wave shaper position towards the liner apex, the jet tip velocity and the jet velocity gradient increase. In addition, the results of the study also pointed out the existence of the wave shaper position at which the penetration depth is greatest. They indicate a match between the simulation and experimental results. The differences between simulated and experimental penetration depth are less than 15%. The results of the study are the basis for the evaluation of the influence of the wave shaper position on the liner collapse and the reasonable use of the wave shaper in the structure of the shaped charge.

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“…A cylindrical high-explosive charge with a wave-shaper is mainly used in shaped charges to increase the jet velocity of the shaped charge in high-explosive anti-tank warheads, or to improve the performance of Explosively Formed Projectiles [2,3]. Researchers around the world have conducted extensive studies on detonation wave propagation and interaction with regular/Mach reflection.…”

Section: Introductionmentioning

confidence: 99%

“…This line is a streamline across, within which the pressure is continuous but the velocity and the density are not. Therefore, the pressure of the triple point Q, which is equal to that in regions (2) and (3), can be defined as follows:…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Study on Detonation Wave Propagation in Cylindrical High Explosive Charges with a Wave-shaper

Jian¹,

Zhang²,

He³

et al. 2016

Cent. Eur. J. Energ. Mater.

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Abstract:The use of a cylindrical high-explosive charge with a wave-shaper is an efficient way to obtain an ultra-high pressure and a convergent detonation wave. An analysis of flow fields corresponding to the regular and Mach reflection of detonation waves in a cylindrical high-explosive charge with a wave-shaper is presented in this paper. The pressure, flow velocity and triple point growth angle of the Mach stem were calculated. The Mach stem height was also determined by using the modified Whitham method. The results show that the Mach stem height rises from zero at the critical angle of Mach reflection and changes to the Chapman-Jouguet detonation state with the propagation of the detonation waves. Shock indentation experiments were conducted, in which a wave-shaper was used in a cylindrical high-explosive charge to form Mach reflection detonation waves. The results showed that the discrepancy between the experimental results and the theoretical calculations was less than 15%, which proves the validity of the proposed theoretical model.

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Mach Wave Control in Explosively Formed Projectile Warhead

Cited by 18 publications

References 5 publications

The EFP Formation and Penetration Capability of Double-Layer Shaped Charge with Wave Shaper

The EFP Formation and Penetration Capability of Double-Layer Shaped Charge with Wave Shaper

Influence of Wave Shaper Position on Jet Formation and Penetration Depth

Theoretical and Experimental Study on Detonation Wave Propagation in Cylindrical High Explosive Charges with a Wave-shaper

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