Extended near field modelling and droplet size distribution for fuel air explosive warhead

Singh, Swati; Singh, V. P.

doi:10.14429/dsj.51.2244

Cited by 8 publications

(4 citation statements)

References 3 publications

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“…The effect of viscosity was taken into consideration in Ref. 8 Visualization of the liquid dispersion process by explosion in an X-ray equipment was conducted in Ref. 12.…”

Section: Introductionmentioning

confidence: 99%

Breakup process of cylindrical viscous liquid specimens after a strong explosion in the core

et al. 2016

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Basic understanding and theoretical description of the expansion and breakup of cylindrical specimens of Newtonian viscous liquid after an explosion of an explosive material in the core are aimed in this work along with the experimental investigation of the discovered phenomena. The unperturbed motion is considered first, and then supplemented by the perturbation growth pattern in the linear approximation. It is shown that a special non-trivial case of the Rayleigh-Taylor instability sets in being triggered by the gas pressure differential between the inner and outer surfaces of the specimens. The spectrum of the growing perturbation waves is established, as well as the growth rate found, and the debris sizes evaluated. An experimental study is undertaken and both the numerical and analytical

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“…The effect of viscosity was taken into consideration in Ref. 8 Visualization of the liquid dispersion process by explosion in an X-ray equipment was conducted in Ref. 12.…”

Section: Introductionmentioning

confidence: 99%

Breakup process of cylindrical viscous liquid specimens after a strong explosion in the core

et al. 2016

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“…Explosive dispersal of the granular materials is extensively applied in industrial security and military engineering [ 1 , 2 , 3 , 4 , 5 ]. Dry powder fire-extinguishing bombs explode and disperse the dry powder particles to form stable aerosols, serving for fire control and suppression [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Dispersal Characteristics Dependence on Mass Ratio for Explosively Driven Dry Powder Particle

et al. 2023

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An investigation on the dispersal characteristics of the cylindrically packed material of dry powder particles driven by explosive load is presented. By establishing a controllable experimental system under laboratory conditions and combining with near-field simulation, the particle dispersal process is described. Additionally, Kelvin–Helmholtz instability is observed during the process of jet deceleration dispersal. The characteristic parameters of radially propagated particles are explored under different mass ratio of particle-to-charge (M/C). Results indicate that, when the charge mass remains constant, an increase in M/C leads to a decrease in dispersed jet number, void radius and maximum velocity, wherein the maximum velocity correlates with calculations by the porous Gurney model. The case of the smaller M/C always has a higher outer-boundary radius and area expansion factor. Findings indicate that when particles detach from the jet upon reaching minimum acceleration and entering low-speed far-field stage from high-speed near-field stage, the outer-boundary radius is 30~36 times the initial particles’ body radius under different M/C. In addition, particle concentration distribution over time and distance is qualitatively analyzed by the grayscale image method. This research can be referential for improving the fire-extinguishing capacity of extinguishing bombs and the damage property of fuel air explosive (FAE).

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“…and current trends in this field of research have been briefly discussed by Rao 2 . Singh 3 , et al developed a theoretical model for the prediction of the meanmass diameter of droplets produced by the fragmentation of liquid fuel in the near field and a distribution model for the initial distribution of the droplet diameter in a FAE device. Zhang 4 , et al studied the critical ignition temperature of FAE with the charge of solid-liquid mixed fuel and the fuel motion state in the acceleration process 5 , and later revealed the dispersal character of the mixed fuel by the burst HE charged in the central pipe 6 .…”

Section: Introductionmentioning

confidence: 99%

Optimal Falling Track Design for Twice detonating Fuze of Double event Fuel air Explosive with High Speed

Zhang

2020

Def. Sc. Jl.

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To prevent the initiation failure caused by the uncontrolled fuze and improve the weapon reliability in the high-speed double-event fuel-air explosive (DEFAE) application, it is necessary to study the TDF motion trajectory and set up a twice-detonating fuze (TDF) design system. Hence, a novel approach of realising the fixed single-point center initiation by TDF within the fuel air cloud is proposed. Accordingly, a computational model for the TDF motion state with the nonlinear mechanics analysis is built due to the expensive and difficult full-scale experiment. Moreover, the TDF guidance design system is programmed using MATLAB with the equations of mechanical equilibrium. In addition, by this system, influences of various input parameters on the TDF motion trajectory are studied in detail singly. Conclusively, the result of a certain TDF example indicates that this paper provides an economical idea for the TDF design, and the developed graphical user interface of high-efficiency for the weapon designers to facilitate the high-speed DEFAE missile development.

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Extended near field modelling and droplet size distribution for fuel air explosive warhead

Cited by 8 publications

References 3 publications

Breakup process of cylindrical viscous liquid specimens after a strong explosion in the core

Breakup process of cylindrical viscous liquid specimens after a strong explosion in the core

Dispersal Characteristics Dependence on Mass Ratio for Explosively Driven Dry Powder Particle

Optimal Falling Track Design for Twice detonating Fuze of Double event Fuel air Explosive with High Speed

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