AMPLIFICATION AND ATTENUATION OF SOUND BY BURNING PROPELLANTS.
Abstract
From the point of view of determining the acoustic stability of a solid propellant rocket motor, it is vital to know whether or not a sound wave is amplified or attenuated upon reflection from the burning surface. If amplification occurs, instability may result. This question has two parts to its answer. The first part concerns the burning response of the combustion layer itself to an acoustic pressure fluctuation, and the second part concerns the matching of an incident and reflected sound wave at the surface in order to determine whether the reflected wave has been amplified or attenuated. In previous theoretical treatments it has been customary to ignore the simultaneous existence of thermal or entropy waves when performing this matching procedure. In this study, the detailed matching of the thermo-acoustic field at the combustion zone boundary is carried out and the results are examined in the light of previous studies on the acoustic stability of solid propellant rocket motors. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1962
- Accession Number
- AD0626719
Entities
People
- R. H. Cantrell
- R. W. Hart
Organizations
- Johns Hopkins University Applied Physics Laboratory