Two-dimensional combustion modeling of heterogeneous solid propellants with finite Peclet number

G. M. Knott, M. Q. Brewster

Research output: Contribution to journalArticlepeer-review


A combustion model has been formulated to solve the burning rate eigenvalue problem for a model heterogeneous solid propellant (two- dimensional sandwich) with Peclet number of O(1), similar to what has been done previously for homogeneous energetic solids. A two-step reaction sequence (high-activation-energy, condensed-phase decomposition followed by low-activation-energy, gas-phase heat release) has been extended from one to two dimensions for nonpremixed (heterogeneous fuel/oxidizer) composite solids. Gas-phase streamwise diffusion, the primary driving force for solid pyrolysis, has been accounted for by including a finite value of the Peclet number. The results show that the value of the Peclet number, a nondimensional burning rate, is constrained to a reasonably small interval by the eigenvalue expression obtained from activation energy asymptotic analysis of the condensed-phase thermal decomposition zone. These results demonstrate the feasibility of and general approach for solving the two-dimensional composite propellant burning rate as an eigenvalue problem. (C) 2000 by The Combustion Institute.

Original languageEnglish (US)
Pages (from-to)91-106
Number of pages16
JournalCombustion and Flame
Issue number1-2
StatePublished - Apr 2000

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology
  • General Physics and Astronomy


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