Study of Secondary Reactions from Explosives Detonated within a Bombproof and Shock Tube System via Visible Spectrometry and Gas and Solids Collection

2004 ◽  
Author(s):  
R. M. Gamache
Keyword(s):  
Shock Tube ◽  
Tube System ◽  
Secondary Reactions ◽  
Visible Spectrometry

Investigation of vibration effect on dynamic calibration of pressure sensors based on shock tube system

Measurement ◽  
2020 ◽  
Vol 149 ◽  
pp. 107015 ◽  
Author(s):  
Kuan Diao ◽  
Zhenjian Yao ◽  
Zhongyu Wang ◽  
Xiaojun Liu ◽  
Chenchen Wang ◽  
...  
Keyword(s):  
Shock Tube ◽  
Pressure Sensors ◽  
Dynamic Calibration ◽  
Tube System ◽  
Vibration Effect

Blast load simulation using conical shock tube systems

2019 ◽  
Vol 11 (2) ◽  
pp. 135-158 ◽  
Author(s):  
Ahmed Ismail ◽  
Mohamed Ezzeldin ◽  
Wael El-Dakhakhni ◽  
Michael Tait
Keyword(s):  
Shock Tube ◽  
Three Dimensional ◽  
Design Parameters ◽  
Civil Infrastructure ◽  
Two Dimensional ◽  
Blast Loads ◽  
Dimensional Model ◽  
Tube System ◽  
Three Dimensional Model ◽  
Conical Shock

With the increased frequency of accidental and deliberate explosions, evaluating the response of civil infrastructure systems to blast loading has been attracting the interests of the research and regulatory communities. However, with the high cost and complex safety and logistical issues associated with field explosives testing, North American blast-resistant construction standards (e.g. ASCE 59-11 and CSA S850-12) recommend the use of shock tubes to simulate blast loads and evaluate relevant structural response. This study first aims at developing a simplified two-dimensional axisymmetric shock tube model, implemented in ANSYS Fluent, a computational fluid dynamics software, and then validating the model using the classical Sod’s shock tube problem solution, as well as available shock tube experimental test results. Subsequently, the developed model is compared to a more complex three-dimensional model and the results show that there is negligible difference between the two models for axisymmetric shock tube performance simulation; however, the three-dimensional model is necessary to simulate non-axisymmetric shock tubes. Following the model validation, extensive analyses are performed to evaluate the influences of shock tube design parameters (e.g. the driver section pressure and length and the expansion section length) on blast wave characteristics to facilitate a shock tube design that would generate shock waves similar to those experienced by civil infrastructure components under blast loads. The results show that the peak reflected pressure increases as the driver pressure increases, while a decrease in the expansion length increases the peak reflected pressure. In addition, the positive phase duration increases as both the driver length and expansion length are increased. Finally, the developed two-dimensional axisymmetric model is used to optimize the dimensions of a physical large-scale conical shock tube system constructed for civil infrastructure component blast response evaluation applications. The capabilities of such shock tube system are further investigated by correlating its design parameters to a range of explosion threats identified by different hemispherical TNT charge weight and distance scenarios.

Characterization of a fiber-optic pressure sensor in a shock tube system for dynamic calibrations

Metrologia ◽  
2014 ◽  
Vol 52 (1) ◽  
pp. 48-53 ◽  
Author(s):  
Martin Zelan ◽  
Fredrik Arrhén ◽  
Per Jarlemark ◽  
Oscar Mollmyr ◽  
Håkan Johansson
Keyword(s):  
Shock Tube ◽  
Pressure Sensor ◽  
Fiber Optic ◽  
Tube System

Some Consideration on the Aerodynamic Design of Blast Wave Simulator Using a Shock Tube System

2019 ◽  
Author(s):  
Suguru Kushida ◽  
Kengo Asada ◽  
Kozo Fujii ◽  
Tomoaki Tatsukawa ◽  
Kazuyuki Sakamoto
Keyword(s):  
Shock Tube ◽  
Blast Wave ◽  
Nozzle Exit ◽  
Jet Flow ◽  
Blast Waves ◽  
Aerodynamic Design ◽  
Computational Simulations ◽  
Tube System ◽  
Reduction Methods ◽  
Driver Section

Abstract Reduction methods of the jet flow associated with simulated blast waves by blast wave simulators are investigated by computational simulations. First, the cause of the jet flow is discussed. After that, the influence of the nozzle angle and the volume of the driver section on the jet flow are investigated. The obtained results show that the jet flow is caused by vortices which are generated at the edge of the nozzle and that the jet can be reduced by decreasing the driver section. Furthermore, the nozzle with the moderate angle reduces the jet flow near the nozzle exit and the nozzle with the widest angle reduces the jet flow far from the nozzle exit. These results indicate reducing the driver section and using the proper nozzle angle according to the distance from the nozzle exit are effective for reducing the jet flow.

Using a shock tube to predict the response of polymeric foam to a blast loading

2006 ◽  
Vol 134 ◽  
pp. 783-787 ◽  
Author(s):  
S. Ouellet ◽  
D. Frost ◽  
A. Bouamoul
Keyword(s):  
Shock Tube ◽  
Blast Loading ◽  
Polymeric Foam

Pyrolysis of methane in a single pulse shock tube

1972 ◽  
Vol 22 (3) ◽  
pp. 303-317 ◽  
Author(s):  
D. H. Napier ◽  
N. Subrahmanyam
Keyword(s):  
Shock Tube ◽  
Single Pulse
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