Accession Number : AD0630920

Title :   AN EXPERIMENTAL INVESTIGATION OF SOME OF THE ACOUSTIC ATTENUATION SOURCES IN THE TE-M-388 (IROQUOIS) ROCKET MOTOR.

Descriptive Note : Scientific rept. no. 2, Feb 65-Jan 66,

Corporate Author : THIOKOL CHEMICAL CORP ELKTON MD

Personal Author(s) : Edwards,John W. ; Mallick,John

Report Date : 25 FEB 1966

Pagination or Media Count : 55

Abstract : A series of experiments was performed in a TE-M-388 motor to determine the acoustic attenuation resulting from the propellant, the headcap, and the igniter. Several different headcap and igniter configurations were evaluated to determine the effect of such changes. A shock tube technique was used to generate an acoustic pulse in a simulated rocket motor; the amplitude of consecutive reflections of the acoustic wave was measured, and the acoustic absorption coefficient was calculated for each configuration. A supplemental series of experiments was performed to determine the complex storage and loss shear modulus for the TE-M-388 propellant, TP-H-3117. The test results showed that the use of a potting compound 'energy damper' in the headcap had a significant detrimental effect on the gross attenuation. The energy absorbed by the propellant appeared to be insignificant and there were no significant differences in the attenuating characteristics of the various igniters. (Author)

Descriptors :   (*SOLID PROPELLANT ROCKET ENGINES, *ACOUSTICS), (*COMBUSTION, SOLID ROCKET PROPELLANTS), SIMULATION, SHOCK TUBES, ROCKET MODELS, SOUND, ATTENUATION, ROCKET IGNITERS

Subject Categories : Combustion and Ignition
      Solid Propellant Rocket Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE