Using Gas-Driven Shock Tubes to Produce Blast Wave Signatures

Frontiers in Neurology
Rubbel Kumar, Ashish Nedungadi

Abstract

The increased incidence of improvised explosives in military conflicts has brought about an increase in the number of traumatic brain injuries (TBIs) observed. Although physical injuries are caused by shrapnel and the immediate blast, encountering the blast wave associated with improvised explosive devices (IEDs) may be the cause of traumatic brain injuries experienced by warfighters. Assessment of the effectiveness of personal protective equipment (PPE) to mitigate TBI requires understanding the interaction between blast waves and human bodies and the ability to replicate the pressure signatures caused by blast waves. Prior research has validated compression-driven shock tube designs as a laboratory method of generating representative pressure signatures, or Friedlander-shaped blast profiles; however, shock tubes can vary depending on their design parameters and not all shock tube designs generate acceptable pressure signatures. This paper presents a comprehensive numerical study of the effects of driver gas, driver (breech) length, and membrane burst pressure of a constant-area shock tube. Discrete locations in the shock tube were probed, and the blast wave evolution in time at these points was analyzed to determine the effec...Continue Reading

References

Sep 20, 2006·The Journal of Head Trauma Rehabilitation·Deborah Warden
Nov 19, 2010·Journal of Neurotrauma·Dexter V ReneerJames W Geddes
Dec 19, 2014·Frontiers in Neurology·Aravind Sundaramurthy, Namas Chandra
Apr 24, 2015·Frontiers in Neurology·Charles E NeedhamLeanne Young

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Brain Injury & Trauma

brain injury after impact to the head is due to both immediate mechanical effects and delayed responses of neural tissues.

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