Opportunity at Air Force Research Laboratory AFRL
Detonating Systems Research
Munitions Directorate, RW/Ordnance Division
||Eglin Air Force Base, FL 325426810
|Eric J Welle
This research will focus on the understanding of fundamental detonation phenomena. Most conventional explosive models are described as composite models, which means they treat a complex reacting flow system with 100 to 1000’s of chemical reactions and intermediate material states as having only two. Those two states are joined by a reaction rate rule that governs how energy is liberated by moving between those states. Other simplifications include the homogenization of explosive microstructure within continuum models. We are conducting research to increase the fidelity of our models by integrating mesoscale effects and relevant chemistry models into our M&S tools. This is being accomplished by a multidiscipline team of modelers, experimenters and theoreticians. In the area of experimentation, small scale experiments are being invented or matured to facilitate the measurement of needed material characteristics such as equations-of-state for the unreacted, partially, and fully reacted energetic materials. Typical measurement techniques include dual streak cameras, Photon Doppler Velocimetry, and high-speed imaging that can be resolved to the nanosecond or sub nanosecond timescale. In the area of modeling, mesoscale and scale bridging models are being evaluated using conventional hydrocodes such as CTH but also includes AFOSR funded developments such as SCIMITAR developed by the University of Iowa. The Associate will be able to design and participate in the execution of complex experiments or be an expert user of hydrocode models. In either case the Associate will work within a multidiscipline team to plan and execute research with primary deliverables being papers and presentations in refereed journals or conferences that are open to the general community or limited based on work content.
Detonation; Explosive; Optical diagnostics; Equation of state; Photon Doppler Velocimetry; Shock to detonation; Thin pulse initiation; Explosive microstructure; Laser interferometry; Modeling and Simulation; Mesoscale
Open to U.S. citizens
Open to Postdoctoral and Senior applicants
$3,000 Supplement for Doctorates in Engineering & Computer Science
Postdoctoral and Senior Associates will receive an appropriately higher stipend based on the number of years of experience past their PhD.