Modeling of Convective Mode Combustion Through Granulated Propellant to Predict Transition to Detonation.

Abstract

Derivation of the two-phase (reactive particle) unsteady-flow conservation equations are presented based upon the generally accepted concept of separated-flow. The resulting formulation is compared with those equations derived by others, and questions are raised as the correctness or interpretation made by previous modelers. Details of the numerical method chosen to solve these equations (an explicit two-step MacCormack scheme) are also presented. Solutions are presented that predict the pressure wave build-up and accelerating ignition (flame) front for highly loaded beds of granulated solid propellant fixed in a rigid container. Some discussion is given of the sensitivity of these predictions as a function of the assumed constitutive relations for interphase heat and momentum transfer, for particle-particle resistance, and propellant burning rate functions. As yet no unambiguous criterion for deflagration-to-detonation transition (DDT) has been presented. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1977
Accession Number
ADA049499

Entities

People

  • Herman Krier
  • James A. Kezerle

Organizations

  • University of Illinois Urbana–Champaign

Tags

DTIC Thesaurus Topics

  • Boundary Layer
  • Burning Rate
  • Combustion
  • Computational Fluid Dynamics
  • Energy
  • Energy Transfer
  • Equations Of State
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Heat Transfer
  • Heat Transfer Coefficients
  • Mechanics
  • Plastic Explosives
  • Pressure Distribution
  • Pressure Gradients
  • Solid Propellants

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Fluid Dynamics.
  • Rocket Propulsion.