Small-Scale Blast Wave Experiments by Means of an Exploding Wire

2017 ◽  
pp. 141-170 ◽  
Author(s):  
Oren Sadot ◽  
Omri Ram ◽  
Eliram Nof ◽  
Eytan Kochavi ◽  
Gabi Ben-Dor
Keyword(s):  
Blast Wave ◽  
Small Scale ◽  
Exploding Wire

Small-scale installation for research of blast wave dynamics

Shock Waves ◽  
2009 ◽  
pp. 127-131
Author(s):  
N.P. Mende ◽  
A.B. Podlaskin ◽  
A.M. Studenkov
Keyword(s):  
Blast Wave ◽  
Small Scale ◽  
Wave Dynamics

High Speed Compressor Surge With Application to Active Control

1990 ◽  
Author(s):  
A. M. Cargill ◽  
C. Freeman
Keyword(s):  
Active Control ◽  
Blast Wave ◽  
High Speed ◽  
High Amplitude ◽  
Rotating Stall ◽  
Effective Control ◽  
Small Scale ◽  
Compressor Surge ◽  
Aero Engines ◽  
Global Type

This paper discusses the mechanics of surge as observed on the high speed axial compressors of modern aero-engines. It argues that the initial stage of the instability consists of a high amplitude blast wave that develops non-linearly from a small scale disturbance and is thus not correctly described by traditional small perturbation stability theories. It follows from this that active control schemes of the global type may be inappropriate, since to be effective, control would have to be applied in a short time and in a very detailed manner, requiring a large number of transducers and actuators. Active control may, though, be effective in controlling the disturbances that grow into the above blast wave and in the control of other phenomena such as rotating stall, given an adequate number of transducers.

Study of the Blast Wave Parameters from Small Scale Explosions

1993 ◽  
Vol 18 (1) ◽  
pp. 11-17 ◽  
Author(s):  
M. M. Ismail ◽  
S. G. Murray
Keyword(s):  
Blast Wave ◽  
Small Scale ◽  
Wave Parameters

Blast wave interaction with structures: an application of exploding wire experiments

2020 ◽  
Vol 3 (4) ◽  
pp. 337-347 ◽  
Author(s):  
Janelle Coleen A. Dela Cueva ◽  
Lingzhi Zheng ◽  
Barry Lawlor ◽  
Kevin T. Q. Nguyen ◽  
Alexander Westra ◽  
...  
Keyword(s):  
Blast Wave ◽  
Wave Interaction ◽  
Exploding Wire ◽  
Blast Wave Interaction

scholarly journals Very High Resolution Calculations of Very Young Supernova Remnants

1983 ◽  
Vol 101 ◽  
pp. 83-86
Author(s):  
Eric M. Jones ◽  
Barham W. Smith
Keyword(s):  
Shock Wave ◽  
Blast Wave ◽  
Supernova Remnants ◽  
Wave Theory ◽  
Small Scale ◽  
Interstellar Material ◽  
Stellar Masses ◽  
Late Stages ◽  
Early Phases ◽  
Very High

After the supernova shock wave has swepted up about 8–10 stellar masses of interstellar material, the SNR structure is well described by blast wave theory (eg. Sedov 1959, Chevalier 1977). In fact, both numerical calculations of the early phases (Jones, Smith, and Straka 1981) and small scale, laboratory simulations (Wilke 1982) show transition to blast wave at 8–10 masses. While the late stages have been well understood for some time, the early stages have only been crudely modeled until very recently.

scholarly journals Blast Wave Assessment in a Compound Survival Container: Small-Scale Testing

Proceedings ◽  
2018 ◽  
Vol 2 (8) ◽  
pp. 540
Author(s):  
A. Caçoilo ◽  
R. Mourão ◽  
B. Belkassem ◽  
F. Teixeira-Dias ◽  
J. Vantomme ◽  
...  
Keyword(s):  
Blast Wave ◽  
Scaling Laws ◽  
Scale Model ◽  
Small Scale ◽  
Multiple Reflections ◽  
Element Analysis ◽  
Time Histories ◽  
Blast Wave Propagation ◽  
Set Up ◽  
Small Scale Model

Propagation of shock waves in partially- or fully-confined environments is a complex phenomenon due to the possibility of multiple reflections, diffractions and superposition of waves. In a military context, the study of such phenomena is of extreme relevance to the evaluation of protection systems, such as survival containers, for personnel and equipment. True scale testing of such structures is costly and time consuming but small-scale models in combination with the Hopkinson-Cranz scaling laws are a viable alternative. This paper combines the use of a small-scale model of a compound survival container with finite element analysis (with LS-DYNA) to develop and validate a numerical model of the blast wave propagation. The first part of the study details the experimental set-up, consisting of a small-scale model of a survival container, which is loaded by the detonation of a scaled explosive charge. The pressure-time histories are recorded in several locations of the model. The second part of the study presents the numerical results and a comparison with the experimental data.

Using Perforated Plates as a Blast Wave Shielding Technique for Application to Tunnels

2011 ◽  
Vol 82 ◽  
pp. 467-472 ◽  
Author(s):  
Geneive Langdon ◽  
Gerald Nurick ◽  
Neil Du Plessis ◽  
Ian Rossiter
Keyword(s):  
Blast Wave ◽  
Perforated Plate ◽  
Separation Distance ◽  
Steel Tube ◽  
Small Scale ◽  
Target Plate ◽  
Perforated Plates ◽  
Plastic Explosive ◽  
Blast Wave Propagation ◽  
Plastic Displacement

Tunnels are vulnerable to devastating explosions, due to the concentration of explosive energy that would be many times greater than in an unconfined blast. One way to mitigate the damage resulting from an explosion is to disrupt the blast wave as it propagates along a tunnel. This paper presents the results of an investigation into the performance of perforated plates as a blast wave mitigation method in tunnel-like structures. Plastic explosive was detonated at the open end of a small-scale rigid steel tube and the blast wave propagated down the tube towards a thin, steel target plate. Increasing the separation distance between the perforated plate and target plate decreased the target plate deformation and increased the impulse at which tearing initiated. Large plastic displacement of the perforated plates was observed. Ansys Autodyn was used to model the experiments and provide additional insight into the blast wave propagation.

High-Speed Compressor Surge With Application to Active Control

1991 ◽  
Vol 113 (2) ◽  
pp. 303-311 ◽  
Author(s):  
A. M. Cargill ◽  
C. Freeman
Keyword(s):  
Active Control ◽  
Blast Wave ◽  
High Speed ◽  
High Amplitude ◽  
Rotating Stall ◽  
Effective Control ◽  
Small Scale ◽  
Compressor Surge ◽  
Aero Engines ◽  
Global Type

This paper discusses the mechanics of surge as observed on the high-speed axial compressors of modern aero-engines. It argues that the initial stage of the instability consists of a high-amplitude blast wave that develops nonlinearly from a small-scale disturbance and is thus not correctly described by traditional small perturbation stability theories. It follows from this that active control schemes of the global type may be inappropriate, since to be effective, control would have to be applied in a short time and in a very detailed manner, requiring a large number of transducers and actuators. Active control may, though, be effective in controlling the disturbances that grow into the above blast wave and in the control of other phenomena such as rotating stall, given an adequate number of transducers.

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