Characterization on the scaling effects and afterburning processes of explosively dispersed reactive powder and fragments
Abstract
The objectives of the proposed work are two fold. The first objective is to increase scientific understanding of the ignition and afterburning processes that occur when low density reactive material (LDRM) fragments and loose reactive particles are dispersed by high explosive (HE) charges using high fidelity numerical simulations. The second objective is to demonstrate, validate, and distribute the state of the art numerical simulation tools used in the proposed work to Air Force personnel at their request. The reactive additives, such as Al and Al-PTFE, Mg, etc., are under investigation for use as energetic additives to munitions to enhance blast performance and quasi static pressure over traditional energetic formulations. Detailed understanding of the controlling parameters and mechanisms of HE dispersed particle afterburning are not well understood. As a result, the full potential of these enhanced HE charges has yet to be realized. Numerical simulations and reactive multiphase flow models are now robust enough to explore the dispersal and afterburning processes of explosively dispersed reactive particles (RP) and LDRM fragments. A parametric study on influence of RP and LDRM enhanced HE charges using a state of the art granular reactive multiphase hydrocode will be performed. Configurations where LDRM or loosely packed reactive particles are placed in an annular shell around a HE core will be considered. The dispersal and combustion of the LDRM fragments or reactive powder and the subsequent combustion will be simulated directly. The parameters to be explored include the diameter, mass, and initial packing of the reactive particles as well as the diameter of the HE charge. In addition, the influence of geometrical confinement and shock reflections on the afterburning processes and quasi static overpressure will also be studied.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 14, 2022
- Source ID
- FA95501910023
Entities
People
- Ryan Houim
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of Florida