Accession Number : AD0609885

Title :   ACOUSTIC ADMITTANCE OF BURNING SOLID PROPELLANT SURFACE.

Descriptive Note : Technical operating rept. no. 10, 1 Apr-30 Jun 61.

Corporate Author : STANFORD RESEARCH INST MENLO PARK CALIF POULTER LABS

Report Date : 30 JUN 1961

Pagination or Media Count : 18

Abstract : Progress is being made in perfecting the proposed single pulse method to a point where it can be employed to obtain the admittance-frequency curve for assorted materials (without combustion in this initial phase of the study). A spark is used to generate a weak shock wave which becomes planar in its travel down a long tube of rectangular cross section. At the end of the tube the wave meets the surface of the solid being tested and is reflected back up the tube. A transducer flushmounted in the tube picks up the pressure-time profiles of the incident and reflected waves. This information in the form of photographs of the oscilloscope traces is used in the machine calcution of the complex acoustic admittance.

Descriptors :   (*SOLID ROCKET PROPELLANTS, ACOUSTIC PROPERTIES), (*ACOUSTICS, ROCKET PROPELLANTS), COMBUSTION, MATHEMATICAL ANALYSIS, THEORY, FREQUENCY, SHOCK WAVES, OSCILLOGRAPHS, TRANSDUCERS, SOUND, PROPAGATION, RECORDING SYSTEMS

Distribution Statement : APPROVED FOR PUBLIC RELEASE