Accession Number : ADA332782

Title :   Oscillations on Electrothermal-Chemical (ETC) Closed-Chamber JA2 Burn-Rate Reductions

Descriptive Note : Final rept. Apr 95-Feb 97

Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : Guercio, Miguel D.

PDF Url : ADA332782

Report Date : DEC 1997

Pagination or Media Count : 90

Abstract : Closed-chamber electrothermal-chemical firings of JA2 7-perf propellant revealed the presence of oscillations on its burn rates. This study was originated by questions raised about the probable causes for this phenomena. The discussion that follows analyses the fiber-optic links utilized for the data acquisition, the code used to deduce the propellant burn rate and the filtering for data smoothing, and finally, the effect of the plasma injection and its energy. The result of this analysis suggests that the plasma injection contributes to burn-rate oscillations, that their amplitude is proportional to the energy of the plasma injected, and that the oscillations are a function of the closed-chamber pressure.

Descriptors :   *BURNING RATE, *OSCILLATION, *SOLID PROPELLANTS, FIBER OPTICS, INJECTION, PLASMAS(PHYSICS), COMBUSTION CHAMBERS.

Subject Categories : Combustion and Ignition
      Solid Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE