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Modeling of combustion processes of stick propellants via combined Eulerian-Lagrangian approachThis research is motivated by the improved ballistic performance of large-caliber guns using stick propellant charges. A comprehensive theoretical model for predicting the flame spreading, combustion, and grain deformation phenomena of long, unslotted stick propellants is presented. The formulation is based upon a combined Eulerian-Lagrangian approach to simulate special characteristics of the two phase combustion process in a cartridge loaded with a bundle of sticks. The model considers five separate regions consisting of the internal perforation, the solid phase, the external interstitial gas phase, and two lumped parameter regions at either end of the stick bundle. For the external gas phase region, a set of transient one-dimensional fluid-dynamic equations using the Eulerian approach is obtained; governing equations for the stick propellants are formulated using the Lagrangian approach. The motion of a representative stick is derived by considering the forces acting on the entire propellant stick. The instantaneous temperature and stress fields in the stick propellant are modeled by considering the transient axisymmetric heat conduction equation and dynamic structural analysis.
Document ID
19890001792
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kuo, K. K. (Pennsylvania State Univ. University Park, PA, United States)
Hsieh, K. C. (Pennsylvania State Univ. University Park, PA, United States)
Athavale, M. M. (Pennsylvania State Univ. University Park, PA, United States)
Date Acquired
September 5, 2013
Publication Date
July 1, 1988
Publication Information
Publication: NASA, Marshall Space Flight Center, Mixing and Demixing Processes in Multiphase Flows with Application to Propulsion Systems
Subject Category
Inorganic And Physical Chemistry
Accession Number
89N11163
Funding Number(s)
CONTRACT_GRANT: DAAG29-83-K-0081
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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