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

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Sundaramurthy, Aravind Raj, K. Gupta Chandra, Namas
Copyright Year	2013
Abstract	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.
File Format	PDF
ISBN	9780791856215
DOI	10.1115/IMECE2013-63732
Volume Number	Volume 3A: Biomedical and Biotechnology Engineering
Conference Proceedings	ASME 2013 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2013-11-15
Publisher Place	San Diego, California, USA
Access Restriction	Subscribed
Subject Keyword	Design Noise (sound) Compression Membranes Shock tubes Explosions Explosives Shock (mechanics) Pressure Waves Impulse (physics) Mach number
Content Type	Text
Resource Type	Article

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