Multiple Flow Regimes in the Extrusion of Nitrocellulose Based Propellant Doughs

Abstract

Flow curves of triple, double, and single base propellant doughs were determined with an extrusion rheometer. In most cases the curves displayed an inflection which was associated with a critical stress in the dough. The critical stress caused the flow to separate into a high stress layer near the boundary of the flow, and a low stress region in the centre of the flow. The critical stress was also associated with flow instabilities. An explanation of the flow behaviour based on the Doi-Edwards theory is presented. Keywords: Australia, Rheology, Viscosity Index.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1988
Accession Number
ADA208959

Entities

People

  • A. T. Starks
  • R. C. Warren

Tags

DTIC Thesaurus Topics

  • Extrusion
  • Flow Rate
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Measurement
  • Mechanical Properties
  • Molecular Weight
  • Molecules
  • Munitions
  • Polymers
  • Propellants
  • Shear Stresses
  • Single Base Propellants
  • Triple Base Propellants
  • Weapons

Readers

  • Fluid Dynamics.
  • Mechanical Engineering/Mechanics of Materials.
  • Rocket Propulsion.