STUDIES OF ENERGETIC SYSTEMS: EXPERIMENTS AND MODELING
Abstract
The objectives of the proposed work are two-fold. The first objective is to increase fundamental understanding of the ignition and combustion dynamics of anaerobic energetic particle combustion in explosive post-detonation flows using state-of-the-art experiments and numerical simulations. The second objective is to develop multiphase reactive flow models and numerical techniques that can be used to study the dynamics of mixtures of energetic materials with embedded reactive metal particles. The numerical simulation methods and tools developed will be made available to Air Force personnel upon request. The anaerobic ignition and combustion dynamics of energetic and metal particles in post-detonation flows are not well understood. However, these flows are too extreme for high-fidelity combustion diagnostics which are necessary for model validation. In addition, models and input data for simulating explosives formulations that consist of mixtures of explosive, energetic oxidizers to improve oxygen balance and reactive material particles do not exist. Thus, this work will study a surrogate problem of a gas-phase detonation interacting with nitromethane droplets doped with aluminum particles. This problem mimics many of the anaerobic ignition and combustion processes in explosive post-detonation flows but is amenable to controlled experiments and detailed modeling. Experiments and simulations at two different length scales are considered. The first scenario consists of a gas-phase detonation interacting with a nitromethane droplet doped with Al particles. The second scenario studies the interaction of strong shocks interacting with clouds of Al-doped nitromethane droplets. New laser/optical diagnostic techniques and experimental strategies employing shock tubes and detonation tubes will be developed. Novel reactive multiphase flow models will be constructed to model anaerobic combustion in explosive post-detonation flows and validated using experimental measurements.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 20, 2023
- Source ID
- FA95502210533
Entities
People
- Subith Vasu
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of Central Florida Board of Trustees