High Pressure Burning Rates of Multi-Base Propellants
Abstract
Burning rates of multi-base, nitrocellulose propellants at high pressure were measured using recently developed techniques. Since the intended application is in-process control, as-manufactured multi-perforated grains (finished as well as interrupted-process propellants) are used. Chamber pressurization to 345 MPa (50,000 psi) is achieved using a hydraulic pump, rather than by nitrogen intensifier systems; the burning interval is determined by timing either the period of acoustic emission or pressure rise. Burning rate data for several lots of M1, M26, M30, and HMX polyurethane propellants are presented. Burning rate consistency of M26 double-base propellant is good, i.e., coefficient of variation approx 1%. However, the burning rate variability of single base propellants is dependent on the dispersion of fibrous nitrocellulose. Burning rate exponents obtained under steady state burning conditions are about 20% higher than recent closed chamber results. The results from a large number of specimens tested during the study demonstrate that the apparatus and data analysis techniques can be efficiently used under production situations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1977
- Accession Number
- ADA060027
Entities
People
- C. R. Felsheim
- L. H. Caveny
- L. M. Pokrocos
Organizations
- Princeton University