Accession Number : AD0800268

Title :   EFFECTS OF ALUMINUM ON SOLID PROPELLANT COMBUSTION INSTABILITY.

Descriptive Note : Final rept.,

Corporate Author : ROCKETDYNE CANOGA PARK CA

Personal Author(s) : Oberg, C. L. ; Huebner, A. L.

Report Date : 30 JUL 1966

Pagination or Media Count : 103

Abstract : An analytical and experimental program to investigate the effects of aluminum on solid-propellant combustion instability was conducted. The analytical phase was devoted to a determination of the energy dissipation rate associated with possible damping mechanisms. The relative magnitude of these damping mechanisms are developed and discussed. The effects of aluminum on nonacoustic instability were also considered in the analytical phase. It is shown that the nonacoustic problem could be treated by employing conventional acoustic methods. This information was used to propose a mechanism for quasi-periodic shedding of aluminum from the burning surface. This analysis was followed by an experimental phase. Measurements were made employing a T-burner in which a pressure pulse could be generated. Measurements were made on propellants containing up to 15-percent aluminum at mean-pressure levels up to 600 psi and over a frequency range of 200 to 2000 cps. A discussion is presented of the results of these experiments, particularly with respect to the damping mechanisms considered in the analysis. Some information applicable to nonacoustic instability was obtained as well. (Author)

Descriptors :   *COMBUSTION), (*SOLID ROCKET PROPELLANTS, (*ALUMINUM, POWDER METALS), STABILITY, DAMPING, DEFORMATION, EFFECTIVENESS, ACOUSTICS, OSCILLATION, SHOCK WAVES, TEST EQUIPMENT, COPPER, SOLID ROCKET PROPELLANT BINDERS, AMMONIUM COMPOUNDS, PERCHLORATES, PARTICLE SIZE, PRESSURE.

Subject Categories : Solid Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE