Combustion modelling of solid propellants
type: CreativeWork
description: [ENG] Among all energetic materials, the combustion of granulated, composite AP/HTPB and double-base solid propellants are studied in thesis. The improvement on the design and safety in industrial processes which use solid propellants are of major importance in industry of energetic materials. Unexpected detonation of granular solid propellants is a key safety issue. Moreover, ignition and subsequent combustion of granular solid propellants are also complex mechanisms of high importance in the manufacturing process of many energetic materials, not only because already mentioned safety issues, but also in due in the design of propulsion systems. Therefore, and in order to properly understand this problem, a model for the characterisation of the detonation process of granular solid propellants under shock tube conditions is developed. To be able to reach this objective, a two-phase model, which considers the conservation equations of mass, momentum and energy and constitutive relations of mass generation, gas-solid particle interaction, interface heat transfer and particle-particle stress is defined. The study performed in this thesis, improve the understanding and modelling of the deflagration-to-denotation (DDT) phenomenon in granular beds of solid propellants. Two different models have been used to calculate pressure, temperature and porosity distributions. The first model considered a modification of the particle momentum governing equation in order to prevent the porosity from reaching values below the minimum value of compaction defined for packed beds of spherical particles. The second model studied does not consider the porosity limiter in the momentum conservation equation but represents the limitation of the porosity directly in the code by preventing the porosity to reach values below a minimum. In addition, the results are obtained by employing several numerical schemes and are compared against those available in the bibliographical sources in order to ass…
abstract: [ENG] Among all energetic materials, the combustion of granulated, composite AP/HTPB and double-base solid propellants are studied in thesis. The improvement on the design and safety in industrial processes which use solid propellants are of major importance in industry of energetic materials. Unexpected detonation of granular solid propellants is a key safety issue. Moreover, ignition and subsequent combustion of granular solid propellants are also complex mechanisms of high importance in the manufacturing process of many energetic materials, not only because already mentioned safety issues, but also in due in the design of propulsion systems. Therefore, and in order to properly understand this problem, a model for the characterisation of the detonation process of granular solid propellants under shock tube conditions is developed. To be able to reach this objective, a two-phase model, which considers the conservation equations of mass, momentum and energy and constitutive relations of mass generation, gas-solid particle interaction, interface heat transfer and particle-particle stress is defined. The study performed in this thesis, improve the understanding and modelling of the deflagration-to-denotation (DDT) phenomenon in granular beds of solid propellants. Two different models have been used to calculate pressure, temperature and porosity distributions. The first model considered a modification of the particle momentum governing equation in order to prevent the porosity from reaching values below the minimum value of compaction defined for packed beds of spherical particles. The second model studied does not consider the porosity limiter in the momentum conservation equation but represents the limitation of the porosity directly in the code by preventing the porosity to reach values below a minimum. In addition, the results are obtained by employing several numerical schemes and are compared against those available in the bibliographical sources in order to ass…
author: López Muñoz, Carmen
keywords: Combustión, Química física y teórica, Reactores químicos, Materiales, Combustion, Chemistry, Physical and theoretical, Chemical reactors, Materials
date published: 2019
date modified: 2026-07-24T05:39:29Z
provider: Universidad Politécnica de Cartagena
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Universidad Politécnica de Cartagena

PropertyValue
property ID: DOI
value: 10.31428/10317/8348