Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Effects of ADN Addition on Composite Solid Propellant Formulations
Submission Author:
Taiane Pereira Pantoja , PA
Co-Authors:
Ivi Silva, Rene Gonçalves, Taiane Pereira Pantoja
Presenter: Taiane Pereira Pantoja
doi://10.26678/ABCM.COBEM2017.COB17-1920
Abstract
In the last decades, it has been studied new formulations and systems to improve the combustion efficiency of solid propellants, to the reduction of the emission of toxic substances to the environment. Hence, this work has as objective to analyze the influence of Ammonium Dinitramide (ADN), replacing the most common oxidant in solid propellants, Ammonium Perchlorate (AP). Due the absence of halogens, the use of ADN becomes more favorable for environmental issues, and maintains the combustion efficiency in this work. The combustion simulations of the various solid propellant formulations were carried out in Chemkin® software using the Premix reactor model. Based on a set of experimental data obtained in the literature, the best conditions of temperature, pressure, mass flow among others physicals properties were analyzed, by means of variational studies in the range of 105 Pa to 60.8E5 Pa and 1000 K to 3000 K, simulating the conditions of a combustion chamber of a rocket motor. Thus, a study of the burning of AP dispersed in HTPB (hydroxyl-terminated polybutadiene) was conducted and compared with the experimental burning of the ADN. The graded addition of ammonium dinitramide over AP was analyzed, verifying the changes caused in the combustion behavior. The results showed significant reduction of halogenated substances, with a slight increase in the combustion intermediates. Therefore, the use of Ammonium Dinitramide as a substitute for Ammonium Perchlorate in solid propellants is possible and relevant, not only improving the combustion process, but also reducing pollutants emission.
Keywords
Ammonium Dinitramide, solid propellant, Motor-Rocket, Ammonium Perchlorate, Combustion
