Mean Flow/Acoustic Interactions and Statistical Analysis of Steady State Combustion of Nonmetallized Composite Solid Propellants.
Abstract
A statistical frame work capable of extending any monodisperse combustion model (steady or nonsteady) to propellants with mixed, polydisperse oxidizer was developed. The BDP model was modified to conform to the ensemble averaging requirements of the method and embedded therein. Methods to include ellipsoidal particles and additives were explored and omissions in the BDP model were corrected. An operational FORTRAN IV code is available for polydisperse, additive free AP propellants. A hydraulic analog of a T-burner was constructed and employed to explore vent flow phenomena. Results show flow downstream of vent is a Karman vortex street created by periodic flow separation/attachment on alternate sides of vent as burner flow oscillates. Examination of Culick's one-dimensional theory has shown that vent gain prediction is a result of an improper boundary condition; proper condition yields null vent condition. A consistent method to deduce performance data from motor test data when pressure, time history is nonneutral was derived. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1976
- Accession Number
- ADA031006
Entities
People
- R. L. Click