Parametric Study of Blast Wave Formation in a Shock Tube

2020 ◽  
pp. 115-124
Author(s):  
Sachin Pullil ◽  
N. Vaibhav ◽  
R. Sanjay ◽  
S. R. Nagaraja
Keyword(s):  
Shock Tube ◽  
Blast Wave ◽  
Parametric Study ◽  
Wave Formation

scholarly journals A Shock Tube Used to Study the Dynamic Response of Blast-Loaded Plates

Proceedings ◽  
2018 ◽  
Vol 2 (8) ◽  
pp. 503
Author(s):  
Vegard Aune ◽  
Folco Casadei ◽  
Georgios Valsamos ◽  
Magnus Langseth ◽  
Tore Børvik
Keyword(s):  
Flow Field ◽  
Dynamic Response ◽  
Shock Tube ◽  
Numerical Simulations ◽  
Blast Wave ◽  
Failure Process ◽  
Wave Formation ◽  
Special Focus ◽  
Flexible Plates ◽  
Insight Into

This study aims to a better understanding of the performance of a shock tube used to produce blast loading in controlled laboratory environments. Special focus is placed on the influence of the diaphragm failure process on the blast wave formation in the tube. Experimental observations are supported by numerical simulations in an attempt to obtain more insight into the underlying phenomena. It was found that the diaphragm failure process introduces a multi-dimensional flow field downstream the diaphragms. This is observed as a loss of directional energy in the distant flow field and therefore affects the reflected overpressure on blast-loaded plates located at the rear end of the tube. These findings provide important insight into how such a facility works, especially if the dynamic response of flexible plates is of interest.

A Parametric Study of the Current-Sheet Speed in a Magnetically Driven Shock Tube

Shock Tubes ◽  
1970 ◽  
pp. 517-528
Author(s):  
C. T. Chang ◽  
M. Popović ◽  
U. Korsbech
Keyword(s):  
Shock Tube ◽  
Current Sheet ◽  
Parametric Study

Design Considerations for Compression Gas Driven Shock Tube to Replicate Field Relevant Primary Blast Condition

2013 ◽  
Author(s):  
Aravind Sundaramurthy ◽  
Raj K. Gupta ◽  
Namas Chandra
Keyword(s):  
Shock Tube ◽  
Blast Wave ◽  
Gaseous Product ◽  
Burst Pressure ◽  
Membrane Thickness ◽  
Time Duration ◽  
Primary Blast ◽  
Blast Overpressure ◽  
Direct Exposure ◽  
Positive Time

Detonation of a high explosive (HE) produces shock-blast wave, noise, shrapnel, and gaseous product; while direct exposure to blast is a concern near the epicenter; shock-blast can affect subjects even at farther distances. The latter is characterized as the primary blast with blast overpressure, time duration, and impulse as shock-blast wave parameters (SWPs). These parameters in turn are a function of the strength of the HE and the distance from the epicenter. It is extremely important to carefully design and operate the shock tube to produce a field relevant SWPs. In this work, we examine the relationship between shock tube adjustable parameters (SAPs) and SWPs to deduce relationship that can be used to control the blast profile and emulate the field conditions. In order to determine these relationships, 30 experiments by varying the membrane thickness, breech length (66.68 to 1209.68 mm) and measurement location was performed. Finally, ConWep was utilized for the comparison of TNT shock-blast profiles with the profiles obtained from shock tube. From these experiments, we observed the following: (a) burst pressure increases with increase in the number of membrane used (membrane thickness) and does not vary significantly with increase in the breech length; (b) within the test section, overpressure and Mach number increases linearly with increase in the burst pressure; however, positive time duration increases with increase in the breech length; (c) near the exit of the shock tube, there is a significant reduction in the positive time duration (PTD) regardless of the breech length.

Numerical simulation of laser–target interaction and blast wave formation

1989 ◽  
Vol 1 (7) ◽  
pp. 1463-1476 ◽  
Author(s):  
John L. Giuliani ◽  
Margaret Mulbrandon ◽  
Ellis Hyman
Keyword(s):  
Numerical Simulation ◽  
Blast Wave ◽  
Wave Formation ◽  
Laser Target ◽  
Target Interaction

scholarly journals Stress Generation in Float Glass Plates Loaded with Blast Wave in a Vertical Square Shock Tube

2004 ◽  
Vol 112 (1304) ◽  
pp. 219-223
Author(s):  
Mizuki NISHI ◽  
Shin'ichi ARATANI ◽  
Hidenori OJIMA ◽  
Kazuyoshi TAKAYAMA
Keyword(s):  
Shock Tube ◽  
Blast Wave ◽  
Float Glass ◽  
Stress Generation ◽  
Glass Plates

Shock Tube Design for High Fidelity Blast Wave Simulation

2015 ◽  
Author(s):  
Christopher Ostoich ◽  
Mark Rapo ◽  
Brian Powell ◽  
Humberto Sainz ◽  
Philemon Chan
Keyword(s):  
Shock Tube ◽  
Blast Wave ◽  
Laboratory Data ◽  
Blast Waves ◽  
High Fidelity ◽  
Ongoing Research ◽  
Wave Simulation ◽  
Blast Overpressure ◽  
Blast Exposure ◽  
Significant Pathway

Traumatic brain injury (TBI) has been recognized as the signature wound of the current conflicts and it has been hypothesized that blast overpressure can contribute a significant pathway to TBI. As such, there are many ongoing research efforts to understand the mechanism to blast induced TBI, which all require blast testing using physical and biological surrogates either in the field or in the laboratory. The use of shock tubes to generate blast-like pressure waves in a laboratory can effectively produce the large amounts of data needed for research into blast induced TBI. A combined analytical, computational, and experimental approach was developed to design an advanced shock tube capable of generating high quality out-of-tube blast waves. The selected tube design was fabricated and laboratory tests at various blast wave levels were conducted. Comparisons of tube-generated laboratory data with explosive-generated field data indicated that the shock tube could accurately reproduce blast wave loading on test surrogates. High fidelity blast wave simulation in the laboratory presents an avenue to rapidly and inexpensively generate the large volumes of data necessary to validate and develop theories linking blast exposure to TBI.

Fluid Structure Interactions for Blast Wave Mitigation

2011 ◽  
Vol 78 (3) ◽  
Author(s):  
Wen Peng ◽  
Zhaoyan Zhang ◽  
George Gogos ◽  
George Gazonas
Keyword(s):  
Shock Wave ◽  
Blast Wave ◽  
Fluid Structure Interaction ◽  
Wave Formation ◽  
Plate Motion ◽  
Fluid Structure Interactions ◽  
Free Standing ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Shock Wave Formation

The dynamic response of a free-standing plate subjected to a blast wave is studied numerically to investigate the effects of fluid-structure interaction (FSI) in blast wave mitigation. Previous work on the FSI between a blast wave and a free-standing plate (Kambouchev, N., et al., 2006, “Nonlinear Compressibility Effects in Fluid-Structure Interaction and Their Implications on the Air-Blast Loading of Structures,” J. Appl. Phys., 100(6), p. 063519) has assumed a constant atmospheric pressure at the back of the plate and neglected the resistance caused by the shock wave formation due to the receding motion of the plate. This paper develops an FSI model that includes the resistance caused by the shock wave formation at the back of the plate. The numerical results show that the resistance to the plate motion is especially pronounced for a light plate, and as a result, the previous work overpredicts the mitigation effects of FSI. Therefore, the effects of the interaction between the plate and the shock wave formation at the back of the plate should be considered in blast wave mitigation.

Shock Wave Formation in a Shock Tube

1952 ◽  
Vol 23 (3) ◽  
pp. 374-375 ◽  
Author(s):  
George A. Lundquist
Keyword(s):  
Shock Wave ◽  
Shock Tube ◽  
Wave Formation ◽  
Shock Wave Formation

Blast wave formation of the extended stellar shells surrounding elliptical galaxies

1985 ◽  
Vol 291 ◽  
pp. 80 ◽  
Author(s):  
R. E. Williams ◽  
W. A. Christiansen
Keyword(s):  
Blast Wave ◽  
Elliptical Galaxies ◽  
Wave Formation
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