Eventos Anais de eventos
ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
DEVELOPMENT OF A BALLISTIC EVALUATION MOTOR FOR KNSU BURN RATE MEASUREMENTS
Submission Author:
Carlos Américo , PR
Co-Authors:
Carlos Américo, Diego Fernando Moro, Carlos Henrique Marchi, Filipe Aguiar
Presenter: Carlos Américo
doi://10.26678/ABCM.ENCIT2020.CIT20-0174
Abstract
In this work, the burning rate of KNSu propellant, understood as a mixture of Potassium Nitrate and Sucrose cold pressed, is estimated analytically by results from Ballistic Evaluation Motor (BEM) experimental tests. The BEM can provide an experimental approach related to the pressure inside the combustion chamber and also, provide analysis related to expansion of gases and thrust generation by nozzles interchangeability. Those experiments were realized via static tests focusing in the instantaneous burning rate versus the absolute pressure (obtained by analogical instrumentation and digital software) and estimated pressure (obtained by numerical estimation). Furthermore, five different nozzles were employed and had their specific impulse, total impulse and thrust calculated for each of them. The results show that KSNu propellant, cold pressed, has an exponential tendency between instantaneous burning rate and chamber pressure. Also, for low pressures applied on this work, the divergent section do not contributed significantly to average thrust value.
Keywords
experimental rocket, burning rate, thrust, KNSu, specific impulse
DOWNLOAD PDF VIEW PRESENTATION
