Accession Number : AD0765626

Title :   Limiting Amplitude Analysis.

Descriptive Note : Final technical rept. Aug 71-Jul 73,

Corporate Author : HERCULES INC MAGNA UTAH BACCHUS WORKS

Personal Author(s) : Jensen,Russell C. ; Beckstead,Merrill W.

Report Date : JUL 1973

Pagination or Media Count : 321

Abstract : A research program has been conducted with the objective to develop, evaluate, and verify a model for predicting the limiting amplitude of acoustic oscillations in solid rocket motors. The mathematical model used was the nonlinear oscillator model. The results of these efforts follow: Theoretical results show nonlinear particle damping and coupling of acoustic energy between acoustic modes to be significant nonlinear damping mechanisms. Results of T-burner firings using propellant seeded with inert ZrO2 particles verified the particle damping theory in that behavior predicted by theory follows the experimental frequency and diameter dependence. Also, nonlinear analyses of T-burner data showed a definite distinction between the nonlinear combustion characteristics of two propellants (SAO-101 and A-13) in terms of the quadratic nonlinear coefficient. It was possible to qualitatively explain instability behavior of a series of test motor firings. (Modified author abstract)

Descriptors :   (*SOLID ROCKET PROPELLANTS, COMBUSTION), SOLID PROPELLANT ROCKET ENGINES, OSCILLATION, DAMPING, ROCKET PROPELLANT GRAINS, REACTION KINETICS, STABILITY, MATHEMATICAL MODELS

Subject Categories : Combustion and Ignition
      Solid Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE