Accession Number : ADA595495


Title :   A Computational Investigation of Various Water-Induced Explosion Mitigation Mechanisms


Descriptive Note : Journal article


Corporate Author : CLEMSON UNIV SC DEPT OF MECHANICAL ENGINEERING


Personal Author(s) : Grujicic, M ; Pandurangan, B ; Zhao, C L ; Cheeseman, Bryan


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a595495.pdf


Report Date : Jan 2007


Pagination or Media Count : 31


Abstract : Interactions of the detonation-product gas, shell-casing fragments, soil ejecta and various other debris with bulk water barriers surrounding the explosive have been demonstrated to have a potentially major beneficial effect in mitigation of the effects of an explosion. In the present work various computational methods ranging from those based on thermo-chemistry of the detonation/combustion chemical reactions to those involving transient, nonlinear-dynamics based mechanical interactions between detonation products, air and water are used to better understand and quantify the beneficial effects of various potential explosion-mitigation mechanisms. In particular, the absorption of the detonation energy by water, water-aerosolization induced reduction in the shock speed, transfer of momentum from the explosion products to water and deceleration/suppression of the combustion reactions are examined computationally. The results obtained show that water evaporation which consumes a substantial portion of the detonation energy plays a dominant role in the overall water-induced explosion-mitigation process. The detonation-product-to-water momentum transfer which causes water aerosolization, on the other hand, is found to be a key prerequisite for efficient explosion mitigation.


Descriptors :   *COMPUTATIONS , *EXPLOSIONS , AEROSOLS , BARRIERS , DEBRIS , DETONATIONS , EJECTA , EVAPORATION , GASES , INTERACTIONS , MOMENTUM TRANSFER , SHOCK , SOILS , SUPPRESSION , THERMOCHEMISTRY , VELOCITY , WATER


Subject Categories : Numerical Mathematics
      Explosions


Distribution Statement : APPROVED FOR PUBLIC RELEASE