A Coupled Interior Ballistics-Finite Element Combustion Instability Analysis Procedure. Part I.
Abstract
An executive routine is developed which should provide the solid propellant grain designer with the capability of performing an interior ballistics analysis while, with a minimum amount of additional effort, at the same time performing a combustion instability prediction analysis of the system. The routine, in effect, couples the output of an existing solid propellant grain design evaluation code, which predicts the acoustic chamber geometry during surface regression, with the input to the existing three-dimensional finite element combustion instability prediction code, FLAP3. The three-dimensional finite element mesh and boundary conditions are generated from the grain surface regression data for the progressive burn times. The entire finite element mesh and boundary condition generation by FLESH3, the companion to FLAP3, is executed with the input of seven parameters, which are obtained from the ballistics code output or from the initial grain geometry. The use of the developed routine, in conjunction with the two existing codes, is demonstrated through a number of example cases of a star design, along with the case of a shell design. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 14, 1978
- Accession Number
- ADA060554
Entities
People
- Robert M. Hackett