Steady deflagration of hmx with simple kinetics: A new modeling paradigm

M. J. Ward, S. F. Son, M Quinn Brewster

Research output: Contribution to conferencePaper

Abstract

A new paradigm is presented for modeling steady combustion of energetic solids, in particular HMX. A simplified chain reaction kinetic mechanism is employed. Specifically, a zero-order, high activation energy initiation/branching reaction in the condensed phase followed by a second-order, low activation energy recombination/termination reaction in the gas phase is assumed. A closed-form solution is obtained based on activation energy asymptotics in the condensed phase and the zero activation energy limit in the gas phase. Comparisons between the model and a variety of experimental observations over a wide range of pressures and initial temperatures are given to demonstrate the validity of the approach. The model provides excellent agreement with burning rate (including sensitivity to pressure and initial temperature) and temperature profile data (in particular, the gas phase), suggesting that in the realm of simplified, approximate kinetics modeling of energetic solids, the low gas phase activation energy limit is a more appropriate modeling paradigm than the classical high activation energy limit or heuristic flame sheet models. The model also indicates that the condensed phase reaction zone plays an important role in determining the deflagration rate of HMX, underscoring the need for better understanding of the chemistry in this zone.

Original languageEnglish (US)
StatePublished - Jan 1 1997
Event35th Aerospace Sciences Meeting and Exhibit, 1997 - Reno, United States
Duration: Jan 6 1997Jan 9 1997

Other

Other35th Aerospace Sciences Meeting and Exhibit, 1997
CountryUnited States
CityReno
Period1/6/971/9/97

ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering

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    Ward, M. J., Son, S. F., & Brewster, M. Q. (1997). Steady deflagration of hmx with simple kinetics: A new modeling paradigm. Paper presented at 35th Aerospace Sciences Meeting and Exhibit, 1997, Reno, United States.