Accession Number:

ADA065064

Title:

The Dynamics of Solid Propellant Combustion.

Descriptive Note:

Technical rept. no. 1 (Annual) Sep 77-Sep 78,

Corporate Author:

POLITECNICO DI MILANO (ITALY) IST DI MACCHINE

Report Date:

1978-09-01

Pagination or Media Count:

156.0

Abstract:

A nonlinear stability analysis of solid propellant burning was carried out, within the framework of a thermal theory and for quasi-steady gas phase. This required an integral method in reducing the partial differential equation for the condensed phase heat conduction to an approximate ordinary differential equation. A nonlinear algebraic function, called restoring function, was found that contains all basic properties of equilibrium and stability of burning solid propellants. This function depends on the nature of the solid propellant including its flame and the operating conditions. Analysis of the restoring function revealed the existence of lower and upper static as well as dynamic burning instability. Nonlinear static and dynamic stability boundaries were determined and stability properties of several unsteady flame models were compared. Most of the predictions were verified by computer simulated tests. The experimental part of this research program is in progress preliminary results obtained by laser doppler velocimetry and shock tube are discussed. Author

Subject Categories:

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

Distribution Statement:

APPROVED FOR PUBLIC RELEASE