INITIATION OF DEFLAGRATION WAVES AT SURFACES OF AMMONIUM PERCHLORATE- COPPER CHROMITE-CARBON PELLETS

Abstract

The relationship between energy flux density I and exposure time tau, which defines the family of boundary conditions necessary and sufficient to cause initiation, was measured. Theoretical analysis was made by means of the partial differential equation which describes the space-time temperature distribution in the pellet in terms of chemical reaction rate, heat of reaction, thermal conductivity, heat capacity, optical absorptivity, and surface reflectivity. Integration of the equation using the experimentally determined chemical and physical parameters and boundary conditions gave the temperature of the pellet -- and in particular the temperature of the pellet surface -- as a function of time, with flux as a parameter. From this solution one obtained for given flux density (a) the temperature T(O,tau) of the initiating surface at the moment tau of cut-off of the energy pulse, and (b) a lower bound for the minimum thermal ignition time.

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Document Details

Document Type
Technical Report
Publication Date
Aug 19, 1963
Accession Number
AD0414965

Entities

People

  • Leonard Mcculley
  • Majorie W. Evans
  • Rodney B. Beyer

Organizations

  • SRI International

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Ammonium Perchlorate
  • Burning Rate
  • Chemical Reaction Properties
  • Chemical Reactions
  • Combustion
  • Decomposition
  • Differential Equations
  • Equations
  • Exothermic Reactions
  • Flux Density
  • Heat Capacity
  • Heat Of Reaction
  • Materials
  • Measurement
  • Partial Differential Equations
  • Reactive Gases
  • Thermal Conductivity

Fields of Study

  • Physics

Readers

  • Calculus or Mathematical Analysis
  • Combustion Dynamics and Shock Wave Physics.
  • Thermal Physics or Thermal Science.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster