A full-scale hydrodynamic simulation of energetic component system

Kim, Bohoon; Jang, Seung-gyo; Yoh, Jack J.

doi:10.1016/j.compfluid.2017.08.010

Cited by 13 publications

(6 citation statements)

References 14 publications

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“…The shock velocity and the pressure are calculated from the measured free surface velocity using Eqs. (11) and (12) and plotted in Fig. 7.…”

Section: Experimental and Numerical Results With Validations A Amentioning

confidence: 99%

“…This equation is integrated with a 4th order scheme in space and a 3rd order Runge-Kutta method in time. 11 While calculating the interface level set function, a drastic change in the material property may give rise to distortion of the interface. To remedy this weakness, a periodic re-initialization is adapted by solving the following equation until a steady state is reached…”

Section: Level Set Methodsmentioning

confidence: 99%

“…The sharp material interface is guaranteed through the use of the hybrid particle level set method. 10 Then, the resulting system of hyperbolic system of equations was solved by a third-order Runge-Kutta and essentially non-oscillatory (ENO) methods 11 for temporal and spatial discretizations, respectively.…”

Section: A Governing Equationsmentioning

confidence: 99%

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Ignition sensitivity study of an energetic train configuration using experiments and simulation

Kim

Yoh

2018

Journal of Applied Physics

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A full scale hydrodynamic simulation intended for the accurate description of shock-induced detonation transition was conducted as a part of an ignition sensitivity analysis of an energetic component system. The system is composed of an exploding foil initiator (EFI), a donor explosive unit, a stainless steel gap, and an acceptor explosive. A series of velocity interferometer system for any reflector measurements were used to validate the hydrodynamic simulations based on the reactive flow model that describes the initiation of energetic materials arranged in a train configuration. A numerical methodology with ignition and growth mechanisms for tracking multi-material boundary interactions as well as severely transient fluid-structure coupling between high explosive charges and metal gap is described. The free surface velocity measurement is used to evaluate the sensitivity of energetic components that are subjected to strong pressure waves. Then, the full scale hydrodynamic simulation is performed on the flyer impacted initiation of an EFI driven pyrotechnical system.

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“…The shock velocity and the pressure are calculated from the measured free surface velocity using Eqs. (11) and (12) and plotted in Fig. 7.…”

Section: Experimental and Numerical Results With Validations A Amentioning

confidence: 99%

Section: Level Set Methodsmentioning

confidence: 99%

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Ignition sensitivity study of an energetic train configuration using experiments and simulation

Kim

Yoh

2018

Journal of Applied Physics

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“…Shockwave generation and velocity have found interesting characterisation methods using bubble generation in water, interferometry with a split beam and schlieren imaging during ignition [142][143][144][145]. Pressure sensors and optical fibres in pressure tubes or chambers can also measure gas generation and shockwave velocity by spacing the measurement points along the length of the tube in increments away from the igniter [75].…”

Section: Characterisation: Techniques and Principlesmentioning

confidence: 99%

Towards Safer Primers: A Review

Lundgaard

Cahill

et al. 2019

Technologies

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Primers are used to reliably initiate a secondary explosive in a wide range of industrial and defence applications. However, established primer technologies pose both direct and indirect risks to health and safety. This review analyses a new generation of primer materials and ignition control mechanisms that have been developed to address these risks in firearms. Electrically or optically initiated metal, oxide and semiconductor-based devices show promise as alternatives for heavy metal percussive primers. The prospects for wider use of low-cost, safe, reliable and non-toxic primers are discussed in view of these developments.

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“…13 Os explosivos químicos podem ser classificados quanto sua natureza química em explosivos ou misturas explosivas e quanto sua performance durante a queima em primário e secundário. 14 As substâncias que se classificam como explosivos, ou seja, que liberam grandes quantidades de gases e calor em curto espaço de tempo, apresentam grupos terminais com propriedades tais como: compostos nitrados; esteres nitrados; azidas; nitraminas; derivados de ácidos clóricos ou perclóricos, além de outros compostos capazes de gerar explosões, como, tetrazinas e peróxidos. A classificação quanto à performance indica a sensibilidade do explosivo a impacto ou calor para iniciar sua detonação.…”

Section: Explosivo Químicounclassified