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

Jian, Pan; Zhang, Xianfeng; He, Yong; Deng, Qibin; Guan, Zhongwei

doi:10.22211/cejem/65004

Cited by 6 publications

(5 citation statements)

References 19 publications

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“…It can be seen from the formula that the Mach wave intensity of detonation wave propagating steadily in DLSC is determined by the detonation velocity and the polytropic exponent of the explosive. Using the method of theoretical analysis and numerical simulation, the LE is taken as TNT, the parameters are taken from reference [11] and the HE is Comp B, RDX, Octol and PBX9404 respectively. The results are compared as shown in Table 3.…”

Section: Resultsmentioning

confidence: 99%

“…Since the 1970s, through experimental research many scholars have confirmed that the detonation waves in the shaped charge with wave shaper collide with each other can form Mach waves [8]; Tang used high-speed photography to measure the Mach wave formed in the shaped charge, the detonation speed reached 1.9 times of the CÀ J value and the detonation pressure reached 3 times of the CÀ J value [9]; Yang established a theoretical formula for the interaction of detonation waves in shaped charge with the wave shaper according to the Whitham method [10]; Pan pointed out that the critical incident angle of the Mach reflection caused by the detonation wave depends on the polytropic exponent of the explosives and the formula for calculating the pressure and height of the Mach stem was given [11].…”

Section: Introductionmentioning

confidence: 99%

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Study on Overdriven Detonation of Double‐Layer Shaped Charge

Liu

Yin

Wang

2019

Propellants Explo Pyrotec

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Overdriven detonation(ODD) means that the detonation process of explosives no longer follows the CÀ J detonation process and its detonation parameters are larger than the CÀ J values. ODD is an unstable detonation process. With the increasing of propagation distance, detonation parameters tend to CÀ J value gradually. The doublelayer shaped charge (DLSC) with high detonation velocity explosive (HE) in the outer layer and low detonation velocity explosive (LE) in the inner layer can keep the axis of shaped charge in the ODD state all the time. The paper derived formulas for calculating the parameters of overdriven detonation when the HE detonates the LE. Based on the conservation of momentum, mass and energy, the func-tional relationship between the intensity of Mach wave and the incident angle of the detonation wave in the shaped charge is deduced. Study on the propagation law of detonation waves in DLSC with the wave shaper by numerical simulation. The results show that the peak value of Mach wave pressure in DLSC is not increased compared with that in ordinary shaped charge (OSC), but the attenuation speed of Mach wave pressure can be delayed and ultimately in the ODD state. The final parameters of the ODD state are determined by the detonation velocity and the polytropic exponent of the explosive. The results of numerical simulation are consistent with theoretical calculation, which confirms the accuracy of the formulas.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on Overdriven Detonation of Double‐Layer Shaped Charge

Liu

Yin

Wang

2019

Propellants Explo Pyrotec

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“…Dunne [ 20 , 21 ] obtained the calculation method of the Mach wave parameters, and pointed out that the polytropic exponent of explosives determines the critical incidence angle when detonation waves collide with each other to form Mach waves. Pan [ 22 , 23 ] carried out a more in-depth study on the propagation and collision process of detonation waves in SCWS.…”

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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“…According to the works of Sternberg et al [13][14][15][16], the ratio between the pressure in regions (1) and ( 2) is given by…”

Section: Interaction Analysis Of Detonation Waves Inmentioning

confidence: 99%

Experimental Study of Penetration Capability of an Annular-Shaped Charge under Multipoint Synchronous Initiation

Jie,

Qing,

Jiandong

et al. 2023

Shock and Vibration

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The large-distance penetration capability of an annular-shaped charge under multipoint synchronous initiation was experimentally investigated. For different annular charge structures and different multipoint initiation settings, incident angle, collision type of detonation waves, and overpressure on the shaped charge’s liner at adjacent initiation points were analyzed using the detonation wave propagation theory. Furthermore, the shaped charge’s penetration capability at a standoff distance of 1–15 m from a 20 mm thick 45# steel plate (the target) was determined through penetration experiments. It was found that the annular cutter formed by the 500 mm diameter annular shaped charge (charge width: 100 mm) completely penetrated the target for a large distance, namely a distance of 150 times the charge width. The ratio of the width of the ring gap penetrated by the annular cutter to the liner’s initial radial width was about 1.07; this indicated that the annular cutter’s width was equivalent to the liner’s radial width for the above flight distance, which in turn implied that the annular cutter had superior circular degree. The annular cutter formed in the case of Mach reflection had better circular degree, integrity, and penetration capability than that formed by regular reflection.

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

Cited by 6 publications

References 19 publications

Study on Overdriven Detonation of Double‐Layer Shaped Charge

Study on Overdriven Detonation of Double‐Layer Shaped Charge

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

Experimental Study of Penetration Capability of an Annular-Shaped Charge under Multipoint Synchronous Initiation

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