Characterization of Particle Combustion in a Rijke Burner
Abstract
This report summarizes a research program to study the acoustic interaction of particle additives used in solid propellants. Various examples of combustion instability found in the literature are discussed that give evidence to the existence and nature of distributed combustion. A modified Rijke burner was constructed as the basic experimental tool and was characterized extensively. Stability boundaries were determined, and growth rates were observed to increase with increasing oxygen content and overall mass flow rate. The data indicate that the overall acoustic driving forces in a Rijke burner are dependent upon the acoustic mode shape relative to the flame location and the distribution of energy through the burner, (i.e. the gas flow rates and heat losses). A mathematical model for the Rijke burner has been developed which accounts for the effects of heat loss, variable gas temperature, and particle interactions on acoustic oscillations. The model has been verified by comparing predicted frequency and growth rates for several simple test cases with the corresponding analytical solutions. The model was also compared directly with the experimental data. Unstable combustion, Distributed combustion, Acoustic instability.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1988
- Accession Number
- ADA203732
Entities
People
- M. W. Beckstead
Organizations
- Brigham Young University