Nonlinear Dynamic Combustion of Energetic Solids

195 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2002.The low gas-activation-energy WSB model is used to model the nonlinear unsteady combustion of energetic solids. Additional validation of the model has been obtained by considering the new oxidizer HNF. Comparison of predictions for HNF combustion with a wide range of experimental observations including steady regression rate (pressure, temperature, and radiant flux sensitivities), surface temperature, and linear frequency response to radiation shows good agreement. Results indicate that HNF condensed-phase decomposition is overall slightly exothermic (increasing with pressure) with activation energy similar to that for proton transfer between hydrazinium and nitroformate ions. The gas-phase flame is highly exothermic with low activation energy, suggesting the gas-phase process is more like a low energy-barrier, chain-carrier process than a high-energy thermal process, similar to what has been suggested recently for NC/NG and HMX.U of I OnlyRestricted to the U of I community idenfinitely during batch ingest of legacy ETD

Nonlinear Dynamic Combustion of Energetic Solids

195 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2002.The low gas-activation-energy WSB model is used to model the nonlinear unsteady combustion of energetic solids. Additional validation of the model has been obtained by considering the new oxidizer HNF. Comparison of predictions for HNF combustion with a wide range of experimental observations including steady regression rate (pressure, temperature, and radiant flux sensitivities), surface temperature, and linear frequency response to radiation shows good agreement. Results indicate that HNF condensed-phase decomposition is overall slightly exothermic (increasing with pressure) with activation energy similar to that for proton transfer between hydrazinium and nitroformate ions. The gas-phase flame is highly exothermic with low activation energy, suggesting the gas-phase process is more like a low energy-barrier, chain-carrier process than a high-energy thermal process, similar to what has been suggested recently for NC/NG and HMX.U of I OnlyRestricted to the U of I community idenfinitely during batch ingest of legacy ETD

Multi-scale modeling of solid rocket motors: Time integration methods from computational aerodynamics applied to stable quasi-steady motor burning

Here we consider the problem of efficiently computing the stable burn-back of a solid rocket motor when the motor is in the quasi-steady burning regime of operation. When the motor is modeled as a cavity that is filled with a compressible fluid with normal mass and momentum and energy injection from the solid propellant surface, the problem posed is a standard one in steady computational aerodynamics.published or submitted for publicationis peer reviewe