Accession Number:

ADA065678

Title:

Transient Processes in the Combustion of Nitramine Propellant,

Descriptive Note:

Interim rept. 1 Oct 77-30 Sep 78,

Corporate Author:

JET PROPULSION LAB PASADENA CALIF

Personal Author(s):

Report Date:

1978-11-01

Pagination or Media Count:

68.0

Abstract:

A transient combustion model of nitramine propellants is combined with an isentropic compression shock formation model to determine the role of nitramine propellant combustion in DDT, excluding effects associated with propellant structural properties or mechanical behavior. The model is derived to represent the closed pipe experiment that is widely used to characterize explosives, except that the combustible material is a monolithic charge rather than compressed powder. Although it is argued that mechanical effects are not likely the sole cause of DDT, computations reveal that the transient combustion process cannot by itself produce DDT either by this model. Compressibility of the solid at high pressure is the key factor limiting pressure buildups created by the combustion. On the other hand, combustion mechanisms which promote pressure buildups are identified and related to propellant formulation variables. It is recommended that these mechanisms be included in other models of shock formation and DDT which are being developed elsewhere.

Subject Categories:

  • Ammunition and Explosives
  • Combustion and Ignition
  • Solid Rocket Propellants

Distribution Statement:

APPROVED FOR PUBLIC RELEASE