Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Spray Cone Angles by a Pressure Swirl Injector for Atomization of Gelled Ethanol
Submission Author:
Gustavo Alexandre Achilles Fischer , SP
Co-Authors:
Gustavo Alexandre Achilles Fischer, José Carlos de Andrade, FERNANDO DE SOUZA COSTA
Presenter: Gustavo Alexandre Achilles Fischer
doi://10.26678/ABCM.COBEM2017.COB17-0549
Abstract
Gelled propellants are promising for rocket propulsion applications because they combine the advantages of solid propellants with those of liquid propellants. However, gelled propellants are more difficult to atomize than conventional liquid propellants due to their non-Newtonian behavior and higher viscosity. The application of high pressures during injection allows to reduce the viscosity and to liquefy the gelled propellant near the discharge orifice of the injector. The deformation rates within the injectors due to sudden decrease of the cross-sectional area are very large and the pseudoplasticity effect of the gels becomes essential in the process of atomization. Pressure swirl injectors are widely used in liquid rocket engines due to their high efficiency of atomization in a reduced volume. This paper presents theoretical, semi empirical and experimental results concerning the spray cone angles formed by the injection of liquid or gelled ethanol for application in rocket propulsion. Experimental data were obtained for injection of liquid ethanol and 67 INPM gelled ethanol through of the injector.
Keywords
Pressure Swirl Injector, Atomization, Spray Cone Angles, Gelled Ethanol
