The mechanism of liquid dispersing from a cylinder driven by central dynamic shock loading

Li, Lei; Lu, X. X.; Ren, X. B.; Ren, Yaoyu; Shoutian, Zhao; Yan, X. F.

doi:10.1016/j.dt.2020.07.001

Cited by 7 publications

(2 citation statements)

References 24 publications

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“…Previous studies [ 29 , 30 ] are unable to clearly obtain the internal explosive void formed by the particle dispersal. Through the experimental method here, a circular explosion void was clearly observed as demonstrated in Figure 4 , which is defined as the region within the interface of the cloud, with a radius of R in .…”

Section: Resultsmentioning

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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Section: Resultsmentioning

confidence: 99%

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

et al. 2023

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“…Ripley and Zhang [17] analyzed the unstable mechanisms of jet formation, growth, and disappearance during fuel cloud dispersal. Li et al [18] studied the influence of the tension and shear forces generated by reflected waves on the cloud dispersal process. Ye et al [19], through numerical simulations, obtained the concentration distribution of gas-liquid phase fuel under unconstrained conditions, demonstrating the dynamic instantaneous isothermal field of the entire fuel cloud area during the dispersal process.…”

Section: Introductionmentioning

confidence: 99%

Study on Multi-Scale Cloud Growth Characteristics of Frustoconical Dispersal Devices

Zhou,

Li,

Jiang

et al. 2024

Processes

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This study aims to understand cloud growth behavior and enhance cloud safety and reliability by investigating the design of cloud dispersal devices. Based on the experimental results and simulation results, this study analyzes the dispersion characteristics of cloud materials within a frustoconical device with a semi-cone angle ranging from 0° to 10° across multiple scales. The collision aggregation model for cloud particles and the multi-scale coupling mechanism for cloud growth are established. The research shows that the semi-cone angle of the device extends the effective cloud growth duration and enlarges the cloud macroscopic size. At the mesoscopic scale, vortex phenomena are observed, causing particles to converge within the cloud, resulting in collisions and aggregation. The vortices enhance the continuity of the cloud concentration. The magnitude of these vortices demonstrates a positive correlation with the magnitude of the semi-cone angle of the dispersal device. For a macroscopically stable cloud, the high-concentration area within the cloud moves outward radially with an increase in the semi-cone angle. This study provides a theoretical foundation for cloud morphology control technology, contributing to enhancing the safety and reliability of cloud systems.

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Accurate Compressible Flow Modelling of Liquid Shock Tube Problems

Chandran,

Raju,

Salih

et al. 2024

Lecture Notes in Mechanical Engineering

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The mechanism of liquid dispersing from a cylinder driven by central dynamic shock loading

Cited by 7 publications

References 24 publications

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

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

Study on Multi-Scale Cloud Growth Characteristics of Frustoconical Dispersal Devices

Accurate Compressible Flow Modelling of Liquid Shock Tube Problems

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