A Preliminary Investigation of Velocity-Coupled Erosive Burning.
Abstract
Some aspects of the velocity-coupled erosive burning of solid propellants have been examined. The turbulent flowfield is shown to be an important aspect of the overall problem, and is modeled using an extension of the second-order closure scheme originally developed by Donaldson. A simple preliminary flame model -- that of homogeneously mixed reactants proceeding through a single step reaction -- has been coupled to the surface recession mechanism used by Summerfield. Results for varying core velocity indicate an apparent threshold, above which erosive burning occurs. This threshold velocity is coincident with the turbulence layer descending to a position just inside the flame zone. An appreciable increase in burning rate was observed with the presence of a relatively small turbulence level in the flame zone. The erosion ratio, as a function of core velocity, is qualitatively similar to classical descriptions. The results indicate that quantitative agreement with experimental erosive burning rates may be possible with the implementation of propellant combustion mechanisms at a level consistent with the turbulence closure approach.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1976
- Accession Number
- ADA032895
Entities
People
- Ashok K. Varma
- E. Stokes Fishburne
- Robert A. Beddini