Simulation of gelled propellant doughs isothermal flow through extrusion dies using finite difference method
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AuthorMartínez Pastor, Juan; Franco Chumillas, Patricio; Moratilla Fernández, Domingo; López García, Pedro José; Faura Mateu, Félix
Knowledge AreaIngeniería de los Procesos de Fabricación
SponsorsThe researchers acknowledge to the Spanish Ministry of Economy and Competitiveness and the European Commission their support throughout the ERDF (European Regional Development Fund) by the INNPACTO research project “Smart Propellants” (IPT-2011-0712-020000), involving EXPAL Systems S.A. and Universidad Politecnica de Cartagena (UPCT).
Bibliographic CitationMartínez-Pastor, J., Franco, P., Moratilla, D., López-García, P. J., & Faura, F. (2017). Simulation of gelled propellant doughs isothermal flow through extrusion dies using finite difference method. Procedia Manufacturing, 13, 410–417. doi:10.1016/j.promfg.2017.09.033
During the ram extrusion of gelled propellants, the possible flow instabilities can affect the extruded propellant quality. The numerical modelling helps to enhance the geometry of extrusion die, by minimizing the product distortion caused by material flow during this forming process. In the present work, a numerical model based on the finite difference method is proposed to analyze the flow simulation of double-base gelled propellant doughs through annular channels of extrusion dies. The proposed model implements the pseudo-plastic behavior described by these energetic materials. This model will be used to deduce the configuration of spider legs and annular channels that allow optimize the quality of extruded gelled propellant.
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