Time-Accurate Simulation of Shock Propagation and Reflection in an Axi-Symmetric Shock Tube

Lamnaouer, Mouna; Kassab, Alain J.; Divo, Eduardo; Urquiza, Rodrigo Garza; Polley, Nolan; Petersen, Eric L.

doi:10.2514/6.2010-926

Cited by 2 publications

(2 citation statements)

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“…Numerical flow simulations were performed in the commercial CFD solver, ANSYS FLUENT, employing the simulation techniques and best practices of Lamnaouer et al (2010). Actual experimental data collected during ABS lab tests are used to validate the numerical model of the ABS.…”

Section: 'Virtual' Far-field Blast Environmentmentioning

confidence: 99%

“…For simplicity, the walls of the ABS are numerically defined to be frictionless and to have negligible shear. Convective terms are spatially discretised with the Second Order Upwind scheme where it was found to perform best based on the comparative test performed by Lamnaouer et al (2010). The gauge locations defined follows the exact placements of the pressure transducers of the experimental setup as presented in Figure 11.…”

Section: 'Virtual' Far-field Blast Environmentmentioning

confidence: 99%

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Approximating a far-field blast environment in an advanced blast simulator for explosion resistance testing

Gan

Remennikov

Ritzel³

et al. 2020

International Journal of Protective Structures

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While the current state of blast-resistant design methods is based largely on empirical observations of actual explosive testing or numerical simulations, experimental testing remains the ultimate method for validating blast protection technologies. Field trials for performing systematic experimental studies are exceedingly expensive and inefficient. Conventional blast simulators (shock tubes) enable blast testing to be performed in a safe and controlled laboratory environment but are significantly deficient. The Australian National Facility of Physical Blast Simulation based on the ‘Advanced Blast Simulator’ concept was established to address the shortcomings of conventional blast simulators (shock tubes). The blast simulator at the National Facility of Physical Blast Simulation is a state-of-the-art design having a test section of 1.5 × 2.0 m with dual-mode driver able of operating with either compressed gas or gaseous detonation modes. The simulator is capable of a range of blast-test configurations such as full-reflection wall targets and diffraction model targets. This article aims to demonstrate the ability of the Advanced Blast Simulator in accurately generating a far-field blast environment suitable for high-precision and repeatable explosion testing of various building components. Blast pressure-time histories generated with the Advanced Blast Simulator are validated against equivalent TNT free-field curves reproduced with Conventional Weapons Effects Program. Numerical models based on Computational Fluid Dynamics were developed in ANSYS FLUENT to accurately characterise and visualise the internal flow environment of the National Facility of Physical Blast Simulation Advanced Blast Simulator. The Computational Fluid Dynamics model was also used to explain experimental observations and to determine density and dynamic pressure information for comparisons with free-field explosion conditions.

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Section: 'Virtual' Far-field Blast Environmentmentioning

confidence: 99%

Section: 'Virtual' Far-field Blast Environmentmentioning

confidence: 99%