Numerical Visualization of Blast Wave Interacting with Objects

Dey, Santanu; Thangadurai, Murugan; Chatterjee, Dipankar

doi:10.29252/jafm.11.05.28240

Cited by 14 publications

(4 citation statements)

References 14 publications

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“…7b) and propagating away from the end face. The propagation of vortex rings conflicts with previous research assumptions 45,46 , visualized images help understand clearing effects at model edges (this flow phenomenon conflicts with the assumptions of the Hudson method 47 ), both AUTODYN or LS-DYNA have difficulty simulating this complex flow phenomenon.…”

Section: Discussionmentioning

confidence: 84%

Blast loads and variability on cylindrical shells under different charge orientations

Yin

Zhi

Fan

et al. 2023

Sci Rep

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Cylindrical shells are widely used in public buildings and military protection fields, and it has a high risk of terrorist attacks and military attacks, it is of great social benefit to carry out the anti-blast design of cylindrical shells, which needs to consider building shape and the shape of blast waves. In this paper, cylindrical charges in five directions were detonated on the outer ground of the scaled cylindrical shell, blast loads of the cylindrical shell were measured and blast waves were photographed. The variation of blast load is analyzed by combining the test and simulation results, the difference in peak overpressure of the blast waves on the end face between five orientations is nearly twice. The blast loads in the axial direction of cylindrical charges have a secondary peak phenomenon, and the blast loads between the axial direction and radial direction of cylindrical charges change abruptly at a specific angle. The experimental and simulation methods provide a reference for establishing a blast load database of typical buildings.

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Section: Discussionmentioning

confidence: 84%

Blast loads and variability on cylindrical shells under different charge orientations

Yin

Zhi

Fan

et al. 2023

Sci Rep

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“…В роботі [6] досліджено взаємодію вибухової хвилі з різноманітними об'єктами. Помічено, що круглий диск послаблює вибухову хвилю ефективніше, ніж конус і сфера для тієї ж фронтальної області.…”

Section: аналіз літературних даних та постановка проблемиunclassified

Geometric modeling of blast waves reflected from the cylindrical surface of a sineusidal profile

Kutsenko,

Sukharkova,

Saveliev

et al. 2023

PES

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A method is proposed for geometric modeling of a family of blast wave fronts reflected from a cylindrical surface of a sinusoidal profile. The model of “optical” reflection is adopted as a basis, when for each incident virtual explosive “ray” the angle of reflection is equal to the angle of incidence. To illustrate the graphic-analytical approach, a test model of the formation of a family of reflected wave fronts for a cylindrical parabolic surface has been developed. A cylindrical surface of a sinusoidal profile obtained by bending a rectangular metal sheet by longitudinal forces is considered. Geometric models of a family of blast wave fronts reflected from a cylindrical surface of a sinusoidal profile are described. Maple has been compiled – programs for visualizing models of a family of blast wave fronts reflected from a cylindrical surface. Conducted studies of sinusoidal cylindrical reflectors designed to demonstrate the effect of multiplying the effects of shock blast waves directed towards the fire zone. For their practical use, it is necessary to find the bending parameters of the cylinder such that the virtual beams of the “point” explosive are transformed into a system of beams that are close to parallel in the fire zone. As a result of the research, the parameters of bending of a metal rectangular sheet by longitudinal forces were calculated, and the coordinates of the location of the “point” explosive substance were determined. It is taken into account that cylindrical reflectors with a sinusoidal profile can be manufactured at the site of their use. To do this, a rectangular sheet of metal must be bent by longitudinal forces and the bend must be fixed by welding reinforcement rods. The research carried out is aimed at developing the technology of extinguishing forest fires with directed explosions.

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“…Luan et al (2018) simulated the flow field of a shock tube with a small exit nozzle. Dey et al (2018) used a shock tube to investigate the interaction between the shock wave and three objects, namely, cone, sphere, and circular disc. Barik et al (2020) used a shock tube and studied the effect of bending pre-strain and pressure on the forming behavior of AA5052−H32 sheets.…”

Section: Introductionmentioning

confidence: 99%

Analysis of flow field in a blast simulator combined-driven by explosive charge and compressed gas

Chen

Ren

Ning³

et al. 2023

Front. Earth Sci.

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The flow field characteristics of blast simulators with the explosive-driven method and compression-driven method have been extensively investigated; however, limited effort has been made to the flow field in blast simulators combined-driven by explosive charge and compressed gas. In this paper, the finite volume method governed by the Navier–Stokes equation based on an explosive detonation and k-omega SST turbulence equation was used to analyze the flow field characteristics of blast simulators with three kinds of drive methods, namely, explosive-driven method, compression-driven method, and combined-driven method. The results show that the numerical method could simulate the flow field characteristics of the blast simulators with the explosive-driven method and compression-driven method accurately by comparing to the experimental data. Also, the influence of air turbulence on the explosion flow field cannot be neglected in the case of long running time. It is obtained that the combined-driven method could increase the pressure peak value of shock waves and extends positive pressure duration effectively, owing to the interaction of the shock waves generated from the explosive detonation and the rarefaction wave formed by rupturing the diaphragm. The first overpressure peak value, the second overpressure peak value, and the positive pressure duration obtained by the combined-driven method of 5 kg TNT and 0.3 MPa compressed gas were 1.669 times, 2.172 times, and 2.308 times more than those obtained by the explosive-driven method of 5 kg TNT, respectively. The maximum overpressure and positive pressure duration obtained by the combined-driven method of 5 kg TNT and 0.3 MPa compressed gas were 2.56 times and 1.162 times more than those obtained by the compression-driven method of 0.3 MPa compressed gas, respectively. Moreover, various shock wave environments could be simulated by controlling the charge mass of explosive charge and the initial pressure of compressed gas.

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Numerical Visualization of Blast Wave Interacting with Objects

Cited by 14 publications

References 14 publications

Blast loads and variability on cylindrical shells under different charge orientations

Blast loads and variability on cylindrical shells under different charge orientations

Geometric modeling of blast waves reflected from the cylindrical surface of a sineusidal profile

Analysis of flow field in a blast simulator combined-driven by explosive charge and compressed gas

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