Accession Number:

AD0702196

Title:

FACTORS INFLUENCING IGNITION DELAY TIME OF COMPOSITE SOLID PROPELLANTS,

Descriptive Note:

Corporate Author:

LITTLE (ARTHUR D) INC CAMBRIDGE MASS

Report Date:

1970-01-01

Pagination or Media Count:

11.0

Abstract:

Thermal events occurring on an near a propellant surface during ignition were observed simultaneously using an optical detector operating over two narrow wavelengths 3.79 micrometers which is free of interfering CO2 and H2O thus representing radiation from the surface and 0.43 micrometers which detects the CH radical in the flame above the surface. Aluminized and non-aluminized PBAAAP propellants were heated using an arc-imaging furnace with argon or oxygen flowing near the propellant surface at different velocities and irradiation levels. Combustion products of CO-O2-N2 mixtures of varying compositions were also used to heat the propellants convectively in a hot gas tunnel. Furthermore, the non-aluminized propellant was ignited chemically with fluorine. Differences in the ignition delay time as measured by the two detectors were observed under certain conditions. Factors affecting these differences and the magnitude of the delay time are discussed. Author

Subject Categories:

  • Combustion and Ignition
  • Solid Rocket Propellants

Distribution Statement:

APPROVED FOR PUBLIC RELEASE