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Burning-Rate Models and Their Successors: A Personal Perspective
BurningRate Models and Their Successors A Personal Perspective Author:Martin S. Miller This is a ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD report procured by the Pentagon and made available for public release. It has been reproduced in the best form available to the Pentagon. It is not spiral-bound, but rather assembled with Velobinding in a soft, white linen cover. The Storming Media report number is A633614. The abstract prov... more »ided by the Pentagon follows: The development of models to compute the burning rate of energetic materials has undergone a paradigm shift in the last 15 years from treating the gas-phase reactions as a few global reactions to attempting to describe all of the elementary reactions involved. This shift toward chemical specificity has brought the promise of true predictive capability in such models. Thwarting this promise, however, has been the unattainability of treating the condensed-phase and surface processes with commensurate detail and assurance. In this work, it is shown that limited predictability has recently been achieved by a semi- empirical finesse of the condensed-phase reactions and surface gasification through the agency of a universal pyrolysis law for certain families of propellant ingredients. It is also argued that the long-range prognosis for generalized predictability arising from a first-principles three-phase model lies with developing submodels for the condensed-phase and surface phenomena based on molecular dynamics (MD). However, since a continuum description of the gas-phase processes will always be preferable, the mating of these MD submodels with the continuum gas-phase description will be a non-trivial research issue. To facilitate the coming dialogue between current continuum modelers and future MD modelers, this work describes the conceptual and mathematical basis of the continuum models in considerable detail.« less